[ios] Removed CRWUIWebViewWebController.

BUG=579697 Review URL: https://codereview.chromium.org/1734083003 Cr-Commit-Position: refs/heads/master@{#377647}
author: eugenebut <eugenebut@chromium.org> 2016-02-25 11:46:51 -0800
committer: Commit bot <commit-bot@chromium.org> 2016-02-25 19:47:42 +0000
commit: f059d0473a3d569a4436ae1d3183f705f42d8d28 (patch)
tree: e5b0341b8cf4bc9898486d93e391cb3fcb2123ba /ios/web
parent: beca427acf0fa6eafce4778d7a9eb913eebb6c77 (diff)
download: chromium_src-f059d0473a3d569a4436ae1d3183f705f42d8d28.zip
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4 files changed, 0 insertions, 1657 deletions
diff --git a/ios/web/BUILD.gn b/ios/web/BUILD.gn
index 8623845..d22e3c9 100644
--- a/ios/web/BUILD.gn
+++ b/ios/web/BUILD.gn
@@ -226,8 +226,6 @@ source_set("web") {
     "web_state/ui/crw_touch_tracking_recognizer.mm",
     "web_state/ui/crw_ui_simple_web_view_controller.h",
     "web_state/ui/crw_ui_simple_web_view_controller.mm",
-    "web_state/ui/crw_ui_web_view_web_controller.h",
-    "web_state/ui/crw_ui_web_view_web_controller.mm",
     "web_state/ui/crw_web_controller+protected.h",
     "web_state/ui/crw_web_controller.h",
     "web_state/ui/crw_web_controller.mm",
diff --git a/ios/web/ios_web.gyp b/ios/web/ios_web.gyp
index b2ddd90..e3866aa 100644
--- a/ios/web/ios_web.gyp
+++ b/ios/web/ios_web.gyp
@@ -262,8 +262,6 @@
         'web_state/ui/crw_touch_tracking_recognizer.mm',
         'web_state/ui/crw_ui_simple_web_view_controller.h',
         'web_state/ui/crw_ui_simple_web_view_controller.mm',
-        'web_state/ui/crw_ui_web_view_web_controller.h',
-        'web_state/ui/crw_ui_web_view_web_controller.mm',
         'web_state/ui/crw_web_controller+protected.h',
         'web_state/ui/crw_web_controller.h',
         'web_state/ui/crw_web_controller.mm',
diff --git a/ios/web/web_state/ui/crw_ui_web_view_web_controller.h b/ios/web/web_state/ui/crw_ui_web_view_web_controller.h
deleted file mode 100644
index a007662..0000000
--- a/ios/web/web_state/ui/crw_ui_web_view_web_controller.h
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_WEB_WEB_STATE_UI_CRW_UI_WEB_VIEW_WEB_CONTROLLER_H_
-#define IOS_WEB_WEB_STATE_UI_CRW_UI_WEB_VIEW_WEB_CONTROLLER_H_
-
-#include <stdint.h>
-#import <UIKit/UIKit.h>
-
-#import "ios/web/web_state/crw_recurring_task_delegate.h"
-#import "ios/web/web_state/ui/crw_web_controller.h"
-
-namespace web {
-
-// Continuous JavaScript check timer frequency constants (exposed for tests).
-extern const int64_t kContinuousCheckIntervalMSHigh;
-extern const int64_t kContinuousCheckIntervalMSLow;
-
-}  // namespace web
-
-@class CRWJSInvokeParameterQueue;
-
-// A concrete implementation of CRWWebController based on UIWebView.
-@interface CRWUIWebViewWebController :
-    CRWWebController<CRWRecurringTaskDelegate>
-
-// Designated initializer.
-- (instancetype)initWithWebState:(scoped_ptr<web::WebStateImpl>)webState;
-
-@end
-
-#pragma mark Testing
-
-@interface CRWUIWebViewWebController (UsedOnlyForTesting)
-// Queued message strings received from JavaScript and deferred for processing.
-@property(nonatomic, readonly)
-    CRWJSInvokeParameterQueue* jsInvokeParameterQueue;
-// Used by tests to measure time taken to inject JavaScript.
-@property(nonatomic, readonly)
-    id<CRWRecurringTaskDelegate> recurringTaskDelegate;
-// Acts on the queue of messages received from the JS object encoded as
-// JSON in plain text.
-- (BOOL)respondToMessageQueue:(NSString*)messageQueue
-            userIsInteracting:(BOOL)userIsInteracting
-                    originURL:(const GURL&)originURL;
-@end
-
-#endif  // IOS_WEB_WEB_STATE_UI_CRW_UI_WEB_VIEW_WEB_CONTROLLER_H_
diff --git a/ios/web/web_state/ui/crw_ui_web_view_web_controller.mm b/ios/web/web_state/ui/crw_ui_web_view_web_controller.mm
deleted file mode 100644
index c78e0c0..0000000
--- a/ios/web/web_state/ui/crw_ui_web_view_web_controller.mm
+++ /dev/null
@@ -1,1604 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "ios/web/web_state/ui/crw_ui_web_view_web_controller.h"
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <utility>
-
-#import "base/ios/ios_util.h"
-#import "base/ios/ns_error_util.h"
-#import "base/ios/weak_nsobject.h"
-#include "base/json/json_reader.h"
-#include "base/json/string_escape.h"
-#include "base/mac/bind_objc_block.h"
-#import "base/mac/scoped_nsobject.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/metrics/field_trial.h"
-#include "base/strings/string_util.h"
-#include "base/strings/sys_string_conversions.h"
-#include "base/timer/timer.h"
-#include "base/values.h"
-#import "ios/net/nsurlrequest_util.h"
-#import "ios/web/navigation/crw_session_controller.h"
-#import "ios/web/navigation/crw_session_entry.h"
-#import "ios/web/navigation/navigation_item_impl.h"
-#include "ios/web/net/clients/crw_redirect_network_client_factory.h"
-#import "ios/web/net/crw_url_verifying_protocol_handler.h"
-#include "ios/web/net/request_group_util.h"
-#import "ios/web/public/url_scheme_util.h"
-#include "ios/web/public/web_client.h"
-#import "ios/web/public/web_state/ui/crw_web_view_content_view.h"
-#import "ios/web/ui_web_view_util.h"
-#include "ios/web/web_state/frame_info.h"
-#import "ios/web/web_state/js/crw_js_invoke_parameter_queue.h"
-#import "ios/web/web_state/ui/crw_context_menu_provider.h"
-#import "ios/web/web_state/ui/crw_web_controller+protected.h"
-#import "ios/web/web_state/ui/crw_web_controller.h"
-#import "ios/web/web_state/ui/web_view_js_utils.h"
-#import "ios/web/web_state/web_state_impl.h"
-#import "ios/web/web_state/web_view_internal_creation_util.h"
-#import "net/base/mac/url_conversions.h"
-#include "net/base/net_errors.h"
-#include "url/url_constants.h"
-
-namespace web {
-
-// The following continuous check timer frequency constants are externally
-// available for the purpose of performance tests.
-// Frequency for the continuous checks when a reset in the page object is
-// anticipated shortly. In milliseconds.
-const int64_t kContinuousCheckIntervalMSHigh = 100;
-
-// The maximum duration that the CRWWebController can run in high-frequency
-// check mode before being changed back to the low frequency.
-const int64_t kContinuousCheckHighFrequencyMSMaxDuration = 5000;
-
-// Frequency for the continuous checks when a reset in the page object is not
-// anticipated; checks are only made as a precaution.
-// The URL could be out of date for this many milliseconds, so this should not
-// be increased without careful consideration.
-const int64_t kContinuousCheckIntervalMSLow = 3000;
-
-}  // namespace web
-
-@interface CRWUIWebViewWebController () <CRWRedirectClientDelegate,
-                                         UIWebViewDelegate> {
-  // The UIWebView managed by this instance.
-  base::scoped_nsobject<UIWebView> _uiWebView;
-
-  // Whether caching of the current URL is enabled or not.
-  BOOL _urlCachingEnabled;
-
-  // Temporarily cached current URL. Only valid/set while urlCachingEnabled
-  // is YES.
-  // TODO(stuartmorgan): Change this to a struct so code using it is more
-  // readable.
-  std::pair<GURL, web::URLVerificationTrustLevel> _cachedURL;
-
-  // The last time a URL with absolute trust level was computed.
-  // When an untrusted URL is retrieved from the
-  // |CRWURLVerifyingProtocolHandler|, if the last trusted URL is within
-  // |kContinuousCheckIntervalMSLow|, the trustLevel is upgraded to Mixed.
-  // The reason is that it is sometimes temporarily impossible to do a
-  // AsyncXMLHttpRequest on a web page. When this happen, it is not possible
-  // to check for the validity of the current URL. Because the checker is
-  // only checking every |kContinuousCheckIntervalMSLow| anyway, waiting this
-  // amount of time before triggering an interstitial does not weaken the
-  // security of the browser.
-  base::TimeTicks _lastCorrectURLTime;
-
-  // Each new UIWebView starts in a state where:
-  // - window.location.href is equal to about:blank
-  // - Ajax requests seem to be impossible
-  // Because Ajax requests are used to determine is a URL is verified, this
-  // means it is impossible to do this check until the UIWebView is in a more
-  // sane state. This variable tracks whether verifying the URL is currently
-  // impossible. It starts at YES when a new UIWebView is created,
-  // and will change to NO, as soon as either window.location.href is not
-  // about:blank anymore, or an URL verification request succeeds. This means
-  // that a malicious site that is able to change the value of
-  // window.location.href and that is loaded as the first request will be able
-  // to change its URL to about:blank. As this is not an interesting URL, it is
-  // considered acceptable.
-  BOOL _spoofableRequest;
-
-  // Timer used to make continuous checks on the UIWebView.  Timer is
-  // running only while |webView| is non-nil.
-  scoped_ptr<base::Timer> _continuousCheckTimer;
-  // Timer to lower the check frequency automatically.
-  scoped_ptr<base::Timer> _lowerFrequencyTimer;
-
-  // Counts of calls to |-webViewDidStartLoad:| and |-webViewDidFinishLoad|.
-  // When |_loadCount| is equal to |_unloadCount|, the page is no longer
-  // loading. Used as a fallback to determine when the page is done loading in
-  // case document.readyState isn't sufficient.
-  // When |_loadCount| is 1, the main page is loading (as opposed to a
-  // sub-resource).
-  int _loadCount;
-  int _unloadCount;
-
-  // Backs the property of the same name.
-  BOOL _inJavaScriptContext;
-
-  // Backs the property of the same name.
-  base::scoped_nsobject<CRWJSInvokeParameterQueue> _jsInvokeParameterQueue;
-
-  // Blocks message queue processing (for testing).
-  BOOL _jsMessageQueueThrottled;
-
-  // YES if a video is playing in fullscreen.
-  BOOL _inFullscreenVideo;
-
-  // Backs the property of the same name.
-  id<CRWRecurringTaskDelegate>_recurringTaskDelegate;
-
-  // Redirect client factory.
-  base::scoped_nsobject<CRWRedirectNetworkClientFactory>
-      redirect_client_factory_;
-}
-
-// Whether or not URL caching is enabled. Between enabling and disabling
-// caching, calls to webURLWithTrustLevel: after the first may return the same
-// answer without re-checking the URL.
-@property(nonatomic, setter=setURLCachingEnabled:) BOOL urlCachingEnabled;
-
-// Returns whether the current page is the web views initial (default) page.
-- (BOOL)isDefaultPage;
-
-// Returns whether the given navigation is triggered by a user link click.
-- (BOOL)isLinkNavigation:(UIWebViewNavigationType)navigationType;
-
-// Starts (at the given interval) the timer that drives runRecurringTasks to see
-// whether or not the page has changed. This is used to work around the fact
-// that UIWebView callbacks are not sufficiently reliable to catch every page
-// change.
-- (void)setContinuousCheckTimerInterval:(const base::TimeDelta&)interval;
-
-// Evaluates the supplied JavaScript and returns the result. Will return nil
-// if it is unable to evaluate the JavaScript.
-- (NSString*)stringByEvaluatingJavaScriptFromString:(NSString*)script;
-
-// Evaluates the user-entered JavaScript in the WebView and returns the result.
-// Will return nil if the web view is currently not available.
-- (NSString*)stringByEvaluatingUserJavaScriptFromString:(NSString*)script;
-
-// Checks if the document is loaded, and if so triggers any necessary logic.
-- (void)checkDocumentLoaded;
-
-// Returns a new autoreleased UIWebView.
-- (UIWebView*)createWebView;
-
-// Sets value to web view property.
-- (void)setWebView:(UIWebView*)webView;
-
-// Simulates the events generated by core.js during document loading process.
-// Used for non-HTML documents (e.g. PDF) that do not support data flow from
-// JavaScript to obj-c via iframe injection.
-- (void)generateMissingDocumentLifecycleEvents;
-
-// Makes a best-effort attempt to retroactively construct a load request for an
-// observed-but-unexpected navigation. Should be called any time a page
-// change is detected as having happened without the current internal state
-// indicating it was expected.
-- (void)generateMissingLoadRequestWithURL:(const GURL&)currentURL
-                                 referrer:(const web::Referrer&)referrer;
-
-// Registers the current user agent with the web view.
-- (void)registerUserAgent;
-
-// Returns a child scripting CRWWebController with the given window name.
-- (id<CRWWebControllerScripting>)scriptingInterfaceForWindowNamed:
-    (NSString*)name;
-
-// Called when UIMoviePlayerControllerDidEnterFullscreenNotification is posted.
-- (void)moviePlayerDidEnterFullscreen:(NSNotification*)notification;
-
-// Called when UIMoviePlayerControllerDidExitFullscreenNotification is posted.
-- (void)moviePlayerDidExitFullscreen:(NSNotification*)notification;
-
-// Exits fullscreen mode for any playing videos.
-- (void)exitFullscreenVideo;
-
-// Handles presentation of the web document. Checks and handles URL changes,
-// page refreshes, and title changes.
-- (void)documentPresent;
-
-// Handles queued JS to ObjC messages.
-// All commands are passed via JSON strings, including parameters.
-- (void)respondToJSInvoke;
-
-// Pauses (|throttle|=YES) or resumes (|throttle|=NO) crwebinvoke message
-// processing.
-- (void)setJsMessageQueueThrottled:(BOOL)throttle;
-
-// Removes document load commands from the queue. Otherwise they could be
-// handled after a new page load has begun, which would cause an unwanted
-// redirect.
-- (void)removeDocumentLoadCommandsFromQueue;
-
-// Returns YES if the given URL has a scheme associated with JS->native calls.
-- (BOOL)urlSchemeIsWebInvoke:(const GURL&)url;
-
-// Returns window name given a message and its context.
-- (NSString*)windowNameFromMessage:(base::DictionaryValue*)message
-                           context:(NSDictionary*)context;
-
-// Handles 'anchor.click' message.
-- (BOOL)handleAnchorClickMessage:(base::DictionaryValue*)message
-                         context:(NSDictionary*)context;
-// Handles 'document.loaded' message.
-- (BOOL)handleDocumentLoadedMessage:(base::DictionaryValue*)message
-                            context:(NSDictionary*)context;
-// Handles 'document.present' message.
-- (BOOL)handleDocumentPresentMessage:(base::DictionaryValue*)message
-                             context:(NSDictionary*)context;
-// Handles 'document.retitled' message.
-- (BOOL)handleDocumentRetitledMessage:(base::DictionaryValue*)message
-                              context:(NSDictionary*)context;
-// Handles 'window.close' message.
-- (BOOL)handleWindowCloseMessage:(base::DictionaryValue*)message
-                         context:(NSDictionary*)context;
-// Handles 'window.document.write' message.
-- (BOOL)handleWindowDocumentWriteMessage:(base::DictionaryValue*)message
-                                 context:(NSDictionary*)context;
-// Handles 'window.location' message.
-- (BOOL)handleWindowLocationMessage:(base::DictionaryValue*)message
-                            context:(NSDictionary*)context;
-// Handles 'window.open' message.
-- (BOOL)handleWindowOpenMessage:(base::DictionaryValue*)message
-                        context:(NSDictionary*)context;
-// Handles 'window.stop' message.
-- (BOOL)handleWindowStopMessage:(base::DictionaryValue*)message
-                        context:(NSDictionary*)context;
-// Handles 'window.unload' message.
-- (BOOL)handleWindowUnloadMessage:(base::DictionaryValue*)message
-                          context:(NSDictionary*)context;
-@end
-
-namespace {
-
-// Utility to help catch unwanted JavaScript re-entries. An instance should
-// be created on the stack any time JS will be executed.
-// It uses an instance variable (passed in as a pointer to boolean) that needs
-// to be initialized to false.
-class ScopedReentryGuard {
- public:
-  explicit ScopedReentryGuard(BOOL* is_inside_javascript_context)
-      : is_inside_javascript_context_(is_inside_javascript_context) {
-    DCHECK(!*is_inside_javascript_context_);
-    *is_inside_javascript_context_ = YES;
-  }
-  ~ScopedReentryGuard() {
-    DCHECK(*is_inside_javascript_context_);
-    *is_inside_javascript_context_ = NO;
-  }
-
- private:
-  BOOL* is_inside_javascript_context_;
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedReentryGuard);
-};
-
-// Class allowing to selectively enable caching of |currentURL| on a
-// CRWUIWebViewWebController. As long as an instance of this class lives,
-// the CRWUIWebViewWebController passed as parameter will cache the result for
-// |currentURL| calls.
-class ScopedCachedCurrentUrl {
- public:
-  explicit ScopedCachedCurrentUrl(CRWUIWebViewWebController* web_controller)
-      : web_controller_(web_controller),
-        had_cached_current_url_([web_controller urlCachingEnabled]) {
-    if (!had_cached_current_url_)
-      [web_controller_ setURLCachingEnabled:YES];
-  }
-
-  ~ScopedCachedCurrentUrl() {
-    if (!had_cached_current_url_)
-      [web_controller_ setURLCachingEnabled:NO];
-  }
-
- private:
-  CRWUIWebViewWebController* web_controller_;
-  bool had_cached_current_url_;
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ScopedCachedCurrentUrl);
-};
-
-// Normalizes the URL for the purposes of identifying the origin page (remove
-// any parameters, fragments, etc.) and return an absolute string of the URL.
-std::string NormalizedUrl(const GURL& url) {
-  GURL::Replacements replacements;
-  replacements.ClearQuery();
-  replacements.ClearRef();
-  replacements.ClearUsername();
-  replacements.ClearPassword();
-  GURL page_url(url.ReplaceComponents(replacements));
-
-  return page_url.spec();
-}
-
-// The maximum size of JSON message passed from JavaScript to ObjC.
-// 256kB is an arbitrary number that was chosen to be a magnitude larger than
-// any legitimate message.
-const size_t kMaxMessageQueueSize = 262144;
-
-}  // namespace
-
-@implementation CRWUIWebViewWebController
-
-- (instancetype)initWithWebState:(scoped_ptr<web::WebStateImpl>)webState {
-  self = [super initWithWebState:std::move(webState)];
-  if (self) {
-    _jsInvokeParameterQueue.reset([[CRWJSInvokeParameterQueue alloc] init]);
-
-    NSNotificationCenter* defaultCenter = [NSNotificationCenter defaultCenter];
-    [defaultCenter addObserver:self
-                      selector:@selector(moviePlayerDidEnterFullscreen:)
-                          name:
-        @"UIMoviePlayerControllerDidEnterFullscreenNotification"
-                        object:nil];
-    [defaultCenter addObserver:self
-                      selector:@selector(moviePlayerDidExitFullscreen:)
-                          name:
-        @"UIMoviePlayerControllerDidExitFullscreenNotification"
-                        object:nil];
-    _recurringTaskDelegate = self;
-
-    // UIWebViews require a redirect network client in order to accurately
-    // detect server redirects.
-    scoped_refptr<web::RequestTrackerImpl> requestTracker =
-        self.webStateImpl->GetRequestTracker();
-    if (requestTracker) {
-      redirect_client_factory_.reset(
-          [[CRWRedirectNetworkClientFactory alloc] initWithDelegate:self]);
-      requestTracker->PostIOTask(
-          base::Bind(&net::RequestTracker::AddNetworkClientFactory,
-                     requestTracker, redirect_client_factory_));
-    }
-  }
-  return self;
-}
-
-- (void)dealloc {
-  [[NSNotificationCenter defaultCenter] removeObserver:self];
-  [super dealloc];
-}
-
-#pragma mark - CRWWebController public method implementations
-
-- (void)loadCompleteWithSuccess:(BOOL)loadSuccess {
-  [super loadCompleteWithSuccess:loadSuccess];
-  [self removeDocumentLoadCommandsFromQueue];
-}
-
-- (BOOL)keyboardDisplayRequiresUserAction {
-  return [_uiWebView keyboardDisplayRequiresUserAction];
-}
-
-- (void)setKeyboardDisplayRequiresUserAction:(BOOL)requiresUserAction {
-  [_uiWebView setKeyboardDisplayRequiresUserAction:requiresUserAction];
-}
-
-- (void)evaluateUserJavaScript:(NSString*)script {
-  [self setUserInteractionRegistered:YES];
-  // A script which contains alert() call executed by UIWebView from gcd block
-  // freezes the app (crbug.com/444106), hence this uses the NSObject API.
-  [_uiWebView performSelectorOnMainThread:
-      @selector(stringByEvaluatingJavaScriptFromString:)
-                               withObject:script
-                            waitUntilDone:NO];
-}
-
-#pragma mark Overridden public methods
-
-- (void)wasShown {
-  if (_uiWebView) {
-    // Turn the timer back on, and do an immediate check for anything missed
-    // while the timer was off.
-    [self.recurringTaskDelegate runRecurringTask];
-    _continuousCheckTimer->Reset();
-  }
-  [super wasShown];
-}
-
-- (void)wasHidden {
-  if (self.webView) {
-    // Turn the timer off, to cut down on work being done by background tabs.
-    _continuousCheckTimer->Stop();
-  }
-  [super wasHidden];
-
-  // The video player is not quit/dismissed when the home button is pressed and
-  // Chrome is backgrounded (crbug.com/277206).
-  if (_inFullscreenVideo)
-    [self exitFullscreenVideo];
-}
-
-
-- (void)close {
-  [super close];
-
-  // The timers must not exist at this point, otherwise this object will leak.
-  DCHECK(!_continuousCheckTimer);
-  DCHECK(!_lowerFrequencyTimer);
-}
-
-- (void)childWindowClosed:(NSString*)windowName {
-  // Get the substring of the window name after the hash.
-  NSRange range = [windowName rangeOfString:
-      base::SysUTF8ToNSString(web::kWindowNameSeparator)];
-  if (range.location != NSNotFound) {
-    NSString* target = [windowName substringFromIndex:(range.location + 1)];
-    [self stringByEvaluatingJavaScriptFromString:
-        [NSString stringWithFormat:@"__gCrWeb.windowClosed('%@');", target]];
-  }
-}
-
-- (void)restoreStateAfterURLRejection {
-  // Re-register the user agent, because UIWebView will sometimes try to read
-  // the agent again from a saved search result page in which no other page has
-  // yet been loaded. See crbug.com/260370.
-  [self registerUserAgent];
-  [super restoreStateAfterURLRejection];
-}
-
-#pragma mark -
-#pragma mark Testing-Only Methods
-
-- (void)injectWebViewContentView:(CRWWebViewContentView*)webViewContentView {
-  [super injectWebViewContentView:webViewContentView];
-  [self setWebView:static_cast<UIWebView*>(webViewContentView.webView)];
-}
-
-#pragma mark CRWJSInjectionEvaluatorMethods
-
-- (void)evaluateJavaScript:(NSString*)script
-       stringResultHandler:(web::JavaScriptCompletion)handler {
-  NSString* safeScript = [self scriptByAddingWindowIDCheckForScript:script];
-  web::EvaluateJavaScript(_uiWebView, safeScript, handler);
-}
-
-- (web::WebViewType)webViewType {
-  return web::UI_WEB_VIEW_TYPE;
-}
-
-#pragma mark - Protected property implementations
-
-- (UIView*)webView {
-  return _uiWebView.get();
-}
-
-- (UIScrollView*)webScrollView {
-  return [_uiWebView scrollView];
-}
-
-- (BOOL)urlCachingEnabled {
-  return _urlCachingEnabled;
-}
-
-- (void)setURLCachingEnabled:(BOOL)enabled {
-  if (enabled == _urlCachingEnabled)
-    return;
-  _urlCachingEnabled = enabled;
-  _cachedURL.first = GURL();
-}
-
-- (BOOL)ignoreURLVerificationFailures {
-  return _spoofableRequest;
-}
-
-- (NSString*)title {
-  return [self stringByEvaluatingJavaScriptFromString:
-      @"document.title.length ? document.title : ''"];
-}
-
-#pragma mark Protected method implementations
-
-- (void)ensureWebViewCreated {
-  if (!_uiWebView) {
-    [self setWebView:[self createWebView]];
-    // Notify super class about created web view. -webViewDidChange is not
-    // called from -setWebView: as the latter used in unit tests with fake
-    // web view, which cannot be added to view hierarchy.
-    [self webViewDidChange];
-  }
-}
-
-- (void)resetWebView {
-  [self setWebView:nil];
-}
-
-- (GURL)webURLWithTrustLevel:(web::URLVerificationTrustLevel*)trustLevel {
-  if (_cachedURL.first.is_valid()) {
-    *trustLevel = _cachedURL.second;
-    return _cachedURL.first;
-  }
-  ScopedReentryGuard reentryGuard(&_inJavaScriptContext);
-  const GURL url =
-      [CRWURLVerifyingProtocolHandler currentURLForWebView:_uiWebView
-                                                trustLevel:trustLevel];
-
-  // If verification succeeded, or the URL has changed, then the UIWebView is no
-  // longer in the initial state.
-  if (*trustLevel != web::URLVerificationTrustLevel::kNone ||
-      url != GURL(url::kAboutBlankURL))
-    _spoofableRequest = NO;
-
-  if (*trustLevel == web::URLVerificationTrustLevel::kAbsolute) {
-    _lastCorrectURLTime = base::TimeTicks::Now();
-    if (self.urlCachingEnabled) {
-      _cachedURL.first = url;
-      _cachedURL.second = *trustLevel;
-    }
-  } else if (*trustLevel == web::URLVerificationTrustLevel::kNone &&
-             (base::TimeTicks::Now() - _lastCorrectURLTime) <
-                 base::TimeDelta::FromMilliseconds(
-                     web::kContinuousCheckIntervalMSLow)) {
-    // URL is not trusted, but the last time it was trusted is within
-    // kContinuousCheckIntervalMSLow.
-    *trustLevel = web::URLVerificationTrustLevel::kMixed;
-  }
-
-  return url;
-}
-
-- (BOOL)isCurrentNavigationItemPOST {
-  DCHECK([self currentSessionEntry]);
-  NSData* currentPOSTData =
-      [self currentSessionEntry].navigationItemImpl->GetPostData();
-  return currentPOSTData != nil;
-}
-
-// The core.js cannot pass messages back to obj-c  if it is injected
-// to |WEB_VIEW_DOCUMENT| because it does not support iframe creation used
-// by core.js to communicate back. That functionality is only supported
-// by |WEB_VIEW_HTML_DOCUMENT|. |WEB_VIEW_DOCUMENT| is used when displaying
-// non-HTML contents (e.g. PDF documents).
-- (web::WebViewDocumentType)webViewDocumentType {
-  // This happens during tests.
-  if (!_uiWebView) {
-    return web::WEB_VIEW_DOCUMENT_TYPE_GENERIC;
-  }
-
-  if (base::ios::IsRunningOnIOS9OrLater()) {
-    // On iOS 9, evaluating '' + document always results in [object
-    // HTMLDocument], even for PDFs. However, document.contentType is properly
-    // defined.
-    NSString* MIMEType = [_uiWebView
-        stringByEvaluatingJavaScriptFromString:@"document.contentType"];
-    return [self documentTypeFromMIMEType:MIMEType];
-  } else {
-    // On iOS 8 and below, document.contentType is always undefined. Use this
-    // instead.
-    NSString* documentType =
-        [_uiWebView stringByEvaluatingJavaScriptFromString:@"'' + document"];
-    if ([documentType isEqualToString:@"[object HTMLDocument]"])
-      return web::WEB_VIEW_DOCUMENT_TYPE_HTML;
-    else if ([documentType isEqualToString:@"[object Document]"])
-      return web::WEB_VIEW_DOCUMENT_TYPE_GENERIC;
-  }
-
-  return web::WEB_VIEW_DOCUMENT_TYPE_UNKNOWN;
-}
-
-- (void)loadRequest:(NSMutableURLRequest*)request {
-  DCHECK(web::GetWebClient());
-  GURL requestURL = net::GURLWithNSURL(request.URL);
-  // If the request is for WebUI, add information to let the network stack
-  // access the requestGroupID.
-  if (web::GetWebClient()->IsAppSpecificURL(requestURL)) {
-    // Sub requests of a chrome:// page will not contain the user agent.
-    // Instead use the username part of the URL to allow the network stack to
-    // associate a request to the correct tab.
-    request.URL = web::AddRequestGroupIDToURL(
-        request.URL, self.webStateImpl->GetRequestGroupID());
-  }
-  [_uiWebView loadRequest:request];
-}
-
-- (void)loadWebHTMLString:(NSString*)html forURL:(const GURL&)URL {
-  [_uiWebView loadHTMLString:html baseURL:net::NSURLWithGURL(URL)];
-}
-
-- (BOOL)scriptHasBeenInjectedForClass:(Class)jsInjectionManagerClass
-                       presenceBeacon:(NSString*)beacon {
-  NSString* beaconCheckScript = [NSString stringWithFormat:
-      @"try { typeof %@; } catch (e) { 'undefined'; }", beacon];
-  NSString* result =
-      [self stringByEvaluatingJavaScriptFromString:beaconCheckScript];
-  return [result isEqualToString:@"object"];
-}
-
-- (void)injectScript:(NSString*)script forClass:(Class)JSInjectionManagerClass {
-  // Skip evaluation if there's no content (e.g., if what's being injected is
-  // an umbrella manager).
-  if ([script length]) {
-    [super injectScript:script forClass:JSInjectionManagerClass];
-    [self stringByEvaluatingJavaScriptFromString:script];
-  }
-}
-
-- (void)willLoadCurrentURLInWebView {
-#if !defined(NDEBUG)
-  if (_uiWebView) {
-    // This code uses non-documented API, but is not compiled in release.
-    id documentView = [_uiWebView valueForKey:@"documentView"];
-    id webView = [documentView valueForKey:@"webView"];
-    NSString* userAgent = [webView performSelector:@selector(userAgentForURL:)
-                                        withObject:nil];
-    DCHECK(userAgent);
-    const bool wrongRequestGroupID =
-        ![self.webStateImpl->GetRequestGroupID()
-            isEqualToString:web::ExtractRequestGroupIDFromUserAgent(userAgent)];
-    DLOG_IF(ERROR, wrongRequestGroupID) << "Incorrect user agent in UIWebView";
-  }
-#endif  // !defined(NDEBUG)
-}
-
-- (void)loadRequestForCurrentNavigationItem {
-  DCHECK(self.webView && !self.nativeController);
-
-  // Re-register the user agent, because UIWebView sometimes loses it.
-  // See crbug.com/228397.
-  [self registerUserAgent];
-
-  NSMutableURLRequest* request = [self requestForCurrentNavigationItem];
-
-  ProceduralBlock GETBlock = ^{
-    [self registerLoadRequest:[self currentNavigationURL]
-                     referrer:[self currentSessionEntryReferrer]
-                   transition:[self currentTransition]];
-    [self loadRequest:request];
-  };
-
-  // If there is no POST data, load the request as a GET right away.
-  DCHECK([self currentSessionEntry]);
-  web::NavigationItemImpl* currentItem =
-      [self currentSessionEntry].navigationItemImpl;
-  NSData* POSTData = currentItem->GetPostData();
-  if (!POSTData) {
-    GETBlock();
-    return;
-  }
-
-  ProceduralBlock POSTBlock = ^{
-    [request setHTTPMethod:@"POST"];
-    [request setHTTPBody:POSTData];
-    [request setAllHTTPHeaderFields:[self currentHTTPHeaders]];
-    [self registerLoadRequest:[self currentNavigationURL]
-                     referrer:[self currentSessionEntryReferrer]
-                   transition:[self currentTransition]];
-    [self loadRequest:request];
-  };
-
-  // If POST data is empty or the user does not need to confirm,
-  // load the request right away.
-  if (!POSTData.length || currentItem->ShouldSkipResubmitDataConfirmation()) {
-    POSTBlock();
-    return;
-  }
-
-  // Prompt the user to confirm the POST request.
-  [self.delegate webController:self
-      onFormResubmissionForRequest:request
-                     continueBlock:POSTBlock
-                       cancelBlock:GETBlock];
-}
-
-- (void)setPageChangeProbability:(web::PageChangeProbability)probability {
-  if (probability == web::PAGE_CHANGE_PROBABILITY_LOW) {
-    // Reduce check interval to precautionary frequency.
-    [self setContinuousCheckTimerInterval:
-        base::TimeDelta::FromMilliseconds(web::kContinuousCheckIntervalMSLow)];
-  } else {
-    // Increase the timer frequency, as a window change is anticipated shortly.
-    [self setContinuousCheckTimerInterval:
-        base::TimeDelta::FromMilliseconds(web::kContinuousCheckIntervalMSHigh)];
-
-    if (probability != web::PAGE_CHANGE_PROBABILITY_VERY_HIGH) {
-      // The timer frequency is automatically lowered after a set duration in
-      // case the guess was wrong, to avoid wedging in high-frequency mode.
-      base::Closure closure = base::BindBlock(^{
-          [self setContinuousCheckTimerInterval:
-              base::TimeDelta::FromMilliseconds(
-                  web::kContinuousCheckIntervalMSLow)];
-      });
-      _lowerFrequencyTimer.reset(
-          new base::Timer(FROM_HERE,
-                          base::TimeDelta::FromMilliseconds(
-                              web::kContinuousCheckHighFrequencyMSMaxDuration),
-                          closure, false /* not repeating */));
-      _lowerFrequencyTimer->Reset();
-    }
-  }
-}
-
-- (BOOL)checkForUnexpectedURLChange {
-    // The check makes no sense without an active web view.
-  if (!self.webView)
-    return NO;
-
-  // Change to UIWebView default page is not considered a 'real' change and
-  // URL changes are not reported.
-  if ([self isDefaultPage])
-    return NO;
-
-  // Check if currentURL is unexpected (not the incoming page).
-  // This is necessary to notice page changes if core.js injection is disabled
-  // by a malicious page.
-  if (!self.URLOnStartLoading.is_empty() &&
-      [self currentURL] == self.URLOnStartLoading) {
-    return NO;
-  }
-
-  // If the URL has changed, handle page load mechanics.
-  ScopedCachedCurrentUrl scopedCurrentURL(self);
-  [self webPageChanged];
-  [self checkDocumentLoaded];
-  [self titleDidChange];
-
-  return YES;
-}
-
-- (void)abortWebLoad {
-  // Current load will not complete; this should be communicated upstream to
-  // the delegate, and flagged in the WebView so further messages can be
-  // prevented (which may be confused for messages from newer pages).
-  [_uiWebView stringByEvaluatingJavaScriptFromString:
-      @"document._cancelled = true;"];
-  [_uiWebView stopLoading];
-}
-
-- (void)resetLoadState {
-  _loadCount = 0;
-  _unloadCount = 0;
-}
-
-- (void)setSuppressDialogsWithHelperScript:(NSString*)script {
-  [self stringByEvaluatingJavaScriptFromString:script];
-}
-
-- (void)checkDocumentLoaded {
-  NSString* loaded =
-      [self stringByEvaluatingJavaScriptFromString:
-           @"document.readyState === 'loaded' || "
-            "document.readyState === 'complete'"];
-  if ([loaded isEqualToString:@"true"]) {
-    [self didFinishNavigation];
-  }
-}
-
-- (NSString*)currentReferrerString {
-  return [self stringByEvaluatingJavaScriptFromString:@"document.referrer"];
-}
-
-- (void)titleDidChange {
-  if (![self.delegate respondsToSelector:
-           @selector(webController:titleDidChange:)]) {
-    return;
-  }
-
-  // Checking the URL trust level is expensive. For performance reasons, the
-  // current URL and the trust level cache must be enabled.
-  // NOTE: Adding a ScopedCachedCurrentUrl here is not the right way to solve
-  // this DCHECK.
-  DCHECK(self.urlCachingEnabled);
-
-  // Change to UIWebView default page is not considered a 'real' change and
-  // title changes are not reported.
-  if ([self isDefaultPage])
-    return;
-
-  // The title can be retrieved from the document only if the URL can be
-  // trusted.
-  web::URLVerificationTrustLevel trustLevel =
-      web::URLVerificationTrustLevel::kNone;
-  [self currentURLWithTrustLevel:&trustLevel];
-  if (trustLevel != web::URLVerificationTrustLevel::kAbsolute)
-    return;
-
-  NSString* title = self.title;
-  if ([title length])
-    [self.delegate webController:self titleDidChange:title];
-}
-
-- (void)teminateNetworkActivity {
-  [super terminateNetworkActivity];
-  _jsInvokeParameterQueue.reset([[CRWJSInvokeParameterQueue alloc] init]);
-}
-
-- (void)fetchWebPageSizeWithCompletionHandler:(void(^)(CGSize))handler {
-  if (!self.webView) {
-    handler(CGSizeZero);
-    return;
-  }
-
-  // Ensure that JavaScript has been injected.
-  [self.recurringTaskDelegate runRecurringTask];
-  [super fetchWebPageSizeWithCompletionHandler:handler];
-}
-
-- (void)documentPresent {
-  if (self.loadPhase != web::PAGE_LOADED &&
-      self.loadPhase != web::LOAD_REQUESTED) {
-    return;
-  }
-
-  ScopedCachedCurrentUrl scopedCurrentURL(self);
-
-  // This is a good time to check if the URL has changed.
-  BOOL urlChanged = [self checkForUnexpectedURLChange];
-
-  // This is a good time to check if the page has refreshed.
-  if (!urlChanged && self.windowId != self.lastSeenWindowID)
-    [self webPageChanged];
-
-  // Set initial title.
-  [self titleDidChange];
-}
-
-- (void)webPageChanged {
-  if (self.loadPhase != web::LOAD_REQUESTED ||
-      self.lastRegisteredRequestURL.is_empty() ||
-      self.lastRegisteredRequestURL != [self currentURL]) {
-    // The page change was unexpected (not already messaged to
-    // webWillStartLoadingURL), so fill in the load request.
-    [self generateMissingLoadRequestWithURL:[self currentURL]
-                                   referrer:[self currentReferrer]];
-  }
-
-  [super webPageChanged];
-}
-
-- (void)applyWebViewScrollZoomScaleFromZoomState:
-    (const web::PageZoomState&)zoomState {
-  // A UIWebView's scroll view uses zoom scales in a non-standard way.  The
-  // scroll view's |zoomScale| property is always equal to 1.0, and the
-  // |minimumZoomScale| and |maximumZoomScale| properties are adjusted
-  // proportionally to reflect the relative zoom scale.  Setting the |zoomScale|
-  // property here scales the page by the value set (i.e. setting zoomScale to
-  // 2.0 will update the zoom to twice its initial scale). The maximum-scale or
-  // minimum-scale meta tags of a page may have changed since the state was
-  // recorded, so clamp the zoom scale to the current range if necessary.
-  DCHECK(zoomState.IsValid());
-  CGFloat zoomScale = zoomState.IsLegacyFormat()
-                          ? zoomState.zoom_scale()
-                          : self.webScrollView.minimumZoomScale /
-                                zoomState.minimum_zoom_scale();
-  if (zoomScale < self.webScrollView.minimumZoomScale)
-    zoomScale = self.webScrollView.minimumZoomScale;
-  if (zoomScale > self.webScrollView.maximumZoomScale)
-    zoomScale = self.webScrollView.maximumZoomScale;
-  self.webScrollView.zoomScale = zoomScale;
-}
-
-- (void)handleCancelledError:(NSError*)error {
-  // NSURLErrorCancelled errors generated by the Chrome net stack should be
-  // aborted.  If the error was generated by the UIWebView, it will not have
-  // an underlying net error and will be automatically retried by the web view.
-  DCHECK_EQ(error.code, NSURLErrorCancelled);
-  NSError* underlyingError = base::ios::GetFinalUnderlyingErrorFromError(error);
-  NSString* netDomain = base::SysUTF8ToNSString(net::kErrorDomain);
-  BOOL shouldAbortLoadForCancelledError =
-      [underlyingError.domain isEqualToString:netDomain];
-  if (!shouldAbortLoadForCancelledError)
-    return;
-
-  // NSURLCancelled errors with underlying errors are generated from the
-  // Chrome network stack.  Abort the load in this case.
-  [self abortLoad];
-
-  switch (underlyingError.code) {
-    case net::ERR_ABORTED:
-      // |NSURLErrorCancelled| errors with underlying net error code
-      // |net::ERR_ABORTED| are used by the Chrome network stack to
-      // indicate that the current load should be aborted and the pending
-      // entry should be discarded.
-      [[self sessionController] discardNonCommittedEntries];
-      break;
-    case net::ERR_BLOCKED_BY_CLIENT:
-      // |NSURLErrorCancelled| errors with underlying net error code
-      // |net::ERR_BLOCKED_BY_CLIENT| are used by the Chrome network stack
-      // to indicate that the current load should be aborted and the pending
-      // entry should be kept.
-      break;
-    default:
-      NOTREACHED();
-  }
-}
-
-- (void)loadCompletedForURL:(const GURL&)loadedURL {
-  // This is not actually the right place to call this, and is here to preserve
-  // the existing UIWebView behavior during the WKWebView transition. This
-  // should actually be called at the point where the web view URL is known to
-  // have actually changed, but currently there's not a clear way of knowing
-  // when that happens as a result of a load (vs. an in-page navigation), and
-  // over-calling this would regress other behavior.
-  self.webStateImpl->OnNavigationCommitted(loadedURL);
-}
-
-#pragma mark - JS to ObjC messaging
-
-- (void)respondToJSInvoke {
-  // This call is asynchronous. If the web view has been removed, there is
-  // nothing left to do, so just discard the queued messages and return.
-  if (!self.webView) {
-    _jsInvokeParameterQueue.reset([[CRWJSInvokeParameterQueue alloc] init]);
-    return;
-  }
-  // Messages are queued and processed asynchronously. However, user
-  // may initiate JavaScript at arbitrary times (e.g. through Omnibox
-  // "javascript:alert('foo')"). This delays processing of queued messages
-  // until JavaScript execution is completed. See crbug/228125 for details.
-  if (_inJavaScriptContext) {
-    [self performSelector:@selector(respondToJSInvoke)
-               withObject:nil
-               afterDelay:0];
-    return;
-  }
-  DCHECK(_jsInvokeParameterQueue);
-  while (![_jsInvokeParameterQueue isEmpty]) {
-    CRWJSInvokeParameters* parameters =
-        [_jsInvokeParameterQueue popInvokeParameters];
-    if (!parameters)
-      return;
-    // TODO(stuartmorgan): Some messages (e.g., window.write) should be
-    // processed even if the page has already changed by the time they are
-    // received. crbug.com/228275
-    if ([parameters windowId] != [self windowId]) {
-      // If there is a windowID mismatch, the document has been changed since
-      // messages were added to the queue. Ignore the incoming messages.
-      DLOG(WARNING) << "Messages from JS ignored due to non-matching windowID: "
-                    << [[parameters windowId] UTF8String]
-                    << " != " << [[self windowId] UTF8String];
-      continue;
-    }
-    if (![self respondToMessageQueue:[parameters commandString]
-                   userIsInteracting:[parameters userIsInteracting]
-                           originURL:[parameters originURL]]) {
-      DLOG(WARNING) << "Messages from JS not handled due to invalid format";
-    }
-  }
-}
-
-- (void)handleWebInvokeURL:(const GURL&)url request:(NSURLRequest*)request {
-  DCHECK([self urlSchemeIsWebInvoke:url]);
-  NSURL* nsurl = request.URL;
-  // TODO(stuartmorgan): Remove the NSURL usage here. Will require a logic
-  // change since GURL doesn't parse non-standard URLs into host and fragment
-  if (![nsurl.host isEqualToString:[self windowId]]) {
-    // If there is a windowID mismatch, we may be under attack from a
-    // malicious page, so a defense is to reset the page.
-    DLOG(WARNING) << "Messages from JS ignored due to non-matching windowID: "
-                  << nsurl.host << " != " << [[self windowId] UTF8String];
-    DLOG(WARNING) << "Page reset as security precaution";
-    [self performSelector:@selector(reload) withObject:nil afterDelay:0];
-    return;
-  }
-  if (url.spec().length() > kMaxMessageQueueSize) {
-    DLOG(WARNING) << "Messages from JS ignored due to excessive length";
-    return;
-  }
-  NSString* commandString = [nsurl.fragment stringByRemovingPercentEncoding];
-
-  GURL originURL(net::GURLWithNSURL(request.mainDocumentURL));
-
-  if (url.SchemeIs("crwebinvokeimmediate")) {
-    [self respondToMessageQueue:commandString
-              userIsInteracting:[self userIsInteracting]
-                      originURL:originURL];
-  } else {
-    [_jsInvokeParameterQueue addCommandString:commandString
-                            userIsInteracting:[self userIsInteracting]
-                                    originURL:originURL
-                                  forWindowId:[super windowId]];
-    if (!_jsMessageQueueThrottled) {
-      [self performSelector:@selector(respondToJSInvoke)
-                 withObject:nil
-                 afterDelay:0];
-    }
-  }
-}
-
-- (void)setJsMessageQueueThrottled:(BOOL)throttle {
-  _jsMessageQueueThrottled = throttle;
-  if (!throttle)
-    [self respondToJSInvoke];
-}
-
-- (void)removeDocumentLoadCommandsFromQueue {
-  [_jsInvokeParameterQueue removeCommandString:@"document.present"];
-  [_jsInvokeParameterQueue removeCommandString:@"document.loaded"];
-}
-
-- (BOOL)urlSchemeIsWebInvoke:(const GURL&)url {
-  return url.SchemeIs("crwebinvoke") || url.SchemeIs("crwebinvokeimmediate");
-}
-
-- (CRWJSInvokeParameterQueue*)jsInvokeParameterQueue {
-  return _jsInvokeParameterQueue;
-}
-
-- (BOOL)respondToMessageQueue:(NSString*)messageQueue
-            userIsInteracting:(BOOL)userIsInteracting
-                    originURL:(const GURL&)originURL {
-  ScopedCachedCurrentUrl scopedCurrentURL(self);
-
-  int errorCode = 0;
-  std::string errorMessage;
-  scoped_ptr<base::Value> inputJSONData(base::JSONReader::ReadAndReturnError(
-      base::SysNSStringToUTF8(messageQueue), false, &errorCode, &errorMessage));
-  if (errorCode) {
-    DLOG(WARNING) << "JSON parse error: %s" << errorMessage.c_str();
-    return NO;
-  }
-  // MessageQueues pass messages as a list.
-  base::ListValue* messages = nullptr;
-  if (!inputJSONData->GetAsList(&messages)) {
-    DLOG(WARNING) << "Message queue not a list";
-    return NO;
-  }
-  for (size_t idx = 0; idx != messages->GetSize(); ++idx) {
-    // The same-origin check has to be done for every command to mitigate the
-    // risk of command sequences where the first command would change the page
-    // and the subsequent commands would have unlimited access to it.
-    if (originURL.GetOrigin() != self.currentURL.GetOrigin()) {
-      DLOG(WARNING) << "Message source URL origin: " << originURL.GetOrigin()
-                    << " does not match current URL origin: "
-                    << self.currentURL.GetOrigin();
-      return NO;
-    }
-
-    base::DictionaryValue* message = nullptr;
-    if (!messages->GetDictionary(idx, &message)) {
-      DLOG(WARNING) << "Message could not be retrieved";
-      return NO;
-    }
-    BOOL messageHandled = [self respondToMessage:message
-                               userIsInteracting:userIsInteracting
-                                       originURL:originURL];
-    if (!messageHandled)
-      return NO;
-
-    // If handling the message caused this page to be closed, stop processing
-    // messages.
-    // TODO(stuartmorgan): Ideally messages should continue to be handled until
-    // the end of the event loop (e.g., window.close(); window.open(...);
-    // should do both things). That would require knowing which messages came
-    // in the same event loop, however.
-    if ([self isBeingDestroyed])
-      return YES;
-  }
-  return YES;
-}
-
-- (SEL)selectorToHandleJavaScriptCommand:(const std::string&)command {
-  static std::map<std::string, SEL>* handlers = nullptr;
-  static dispatch_once_t onceToken;
-  dispatch_once(&onceToken, ^{
-    handlers = new std::map<std::string, SEL>();
-    (*handlers)["anchor.click"] = @selector(handleAnchorClickMessage:context:);
-    (*handlers)["document.loaded"] =
-        @selector(handleDocumentLoadedMessage:context:);
-    (*handlers)["document.present"] =
-        @selector(handleDocumentPresentMessage:context:);
-    (*handlers)["document.retitled"] =
-        @selector(handleDocumentRetitledMessage:context:);
-    (*handlers)["window.close"] = @selector(handleWindowCloseMessage:context:);
-    (*handlers)["window.document.write"] =
-        @selector(handleWindowDocumentWriteMessage:context:);
-    (*handlers)["window.location"] =
-        @selector(handleWindowLocationMessage:context:);
-    (*handlers)["window.open"] = @selector(handleWindowOpenMessage:context:);
-    (*handlers)["window.stop"] = @selector(handleWindowStopMessage:context:);
-    (*handlers)["window.unload"] =
-        @selector(handleWindowUnloadMessage:context:);
-  });
-  DCHECK(handlers);
-  auto iter = handlers->find(command);
-  return iter != handlers->end()
-             ? iter->second
-             : [super selectorToHandleJavaScriptCommand:command];
-}
-
-- (NSString*)windowNameFromMessage:(base::DictionaryValue*)message
-                           context:(NSDictionary*)context {
-  std::string target;
-  if(!message->GetString("target", &target)) {
-    DLOG(WARNING) << "JS message parameter not found: target";
-    return nil;
-  }
-  DCHECK(&target);
-  DCHECK(context[web::kOriginURLKey]);
-  const GURL& originURL = net::GURLWithNSURL(context[web::kOriginURLKey]);
-
-  // Unique string made for page/target combination.
-  // Safe to delimit unique string with # since page references won't
-  // contain #.
-  return base::SysUTF8ToNSString(
-      NormalizedUrl(originURL) + web::kWindowNameSeparator + target);
-}
-
-#pragma mark -
-#pragma mark JavaScript message handlers
-
-- (BOOL)handleAnchorClickMessage:(base::DictionaryValue*)message
-                         context:(NSDictionary*)context {
-  // Reset the external click request.
-  [self resetExternalRequest];
-
-  std::string href;
-  if (!message->GetString("href", &href)) {
-    DLOG(WARNING) << "JS message parameter not found: href";
-    return NO;
-  }
-  const GURL targetURL(href);
-  const GURL currentURL([self currentURL]);
-  if (currentURL != targetURL) {
-    if (web::UrlHasWebScheme(targetURL)) {
-      // The referrer is not known yet, and will be updated later.
-      const web::Referrer emptyReferrer;
-      [self registerLoadRequest:targetURL
-                       referrer:emptyReferrer
-                     transition:ui::PAGE_TRANSITION_LINK];
-      [self setPageChangeProbability:web::PAGE_CHANGE_PROBABILITY_HIGH];
-    } else if (web::GetWebClient()->IsAppSpecificURL(targetURL) &&
-               web::GetWebClient()->IsAppSpecificURL(currentURL)) {
-      // Allow navigations between app-specific URLs
-      [self removeWebViewAllowingCachedReconstruction:NO];
-      ui::PageTransition pageTransitionLink =
-          ui::PageTransitionFromInt(ui::PAGE_TRANSITION_LINK);
-      const web::Referrer referrer(currentURL, web::ReferrerPolicyDefault);
-      web::WebState::OpenURLParams openParams(targetURL, referrer, CURRENT_TAB,
-                                              pageTransitionLink, true);
-      [self.delegate openURLWithParams:openParams];
-    }
-  }
-  return YES;
-}
-
-- (BOOL)handleDocumentLoadedMessage:(base::DictionaryValue*)message
-                            context:(NSDictionary*)context {
-  // Very early hashchange events can be missed, hence this extra explicit
-  // check.
-  [self checkForUnexpectedURLChange];
-  [self didFinishNavigation];
-  return YES;
-}
-
-- (BOOL)handleDocumentPresentMessage:(base::DictionaryValue*)message
-                             context:(NSDictionary*)context {
-  NSString* documentCancelled =
-      [self stringByEvaluatingJavaScriptFromString:@"document._cancelled"];
-  if (![documentCancelled isEqualToString:@"true"])
-    [self documentPresent];
-  return YES;
-}
-
-- (BOOL)handleDocumentRetitledMessage:(base::DictionaryValue*)message
-                              context:(NSDictionary*)context {
-  [self titleDidChange];
-  return YES;
-}
-
-- (BOOL)handleWindowCloseMessage:(base::DictionaryValue*)message
-                         context:(NSDictionary*)context {
-  NSString* windowName = [self windowNameFromMessage:message
-                                             context:context];
-  if (!windowName)
-    return NO;
-  [[self scriptingInterfaceForWindowNamed:windowName] orderClose];
-  return YES;
-}
-
-- (BOOL)handleWindowDocumentWriteMessage:(base::DictionaryValue*)message
-                                 context:(NSDictionary*)context {
-  NSString* windowName = [self windowNameFromMessage:message
-                                             context:context];
-  if (!windowName)
-    return NO;
-  std::string HTML;
-  if (!message->GetString("html", &HTML)) {
-    DLOG(WARNING) << "JS message parameter not found: html";
-    return NO;
-  }
-  [[self scriptingInterfaceForWindowNamed:windowName]
-      loadHTML:base::SysUTF8ToNSString(HTML)];
-  return YES;
-}
-
-- (BOOL)handleWindowLocationMessage:(base::DictionaryValue*)message
-                            context:(NSDictionary*)context {
-  NSString* windowName = [self windowNameFromMessage:message
-                                             context:context];
-  if (!windowName)
-    return NO;
-  std::string command;
-  if (!message->GetString("command", &command)) {
-    DLOG(WARNING) << "JS message parameter not found: command";
-    return NO;
-  }
-  std::string value;
-  if (!message->GetString("value", &value)) {
-    DLOG(WARNING) << "JS message parameter not found: value";
-    return NO;
-  }
-  std::string escapedValue;
-  base::EscapeJSONString(value, true, &escapedValue);
-  NSString* HTML =
-      [NSString stringWithFormat:@"<script>%s = %s;</script>",
-                                 command.c_str(),
-                                 escapedValue.c_str()];
-  [[self scriptingInterfaceForWindowNamed:windowName] loadHTML:HTML];
-  return YES;
-}
-
-- (BOOL)handleWindowOpenMessage:(base::DictionaryValue*)message
-                        context:(NSDictionary*)context {
-  NSString* windowName = [self windowNameFromMessage:message
-                                             context:context];
-  if (!windowName)
-    return NO;
-  std::string targetURL;
-  if (!message->GetString("url", &targetURL)) {
-    DLOG(WARNING) << "JS message parameter not found: url";
-    return NO;
-  }
-  std::string referrerPolicy;
-  if (!message->GetString("referrerPolicy", &referrerPolicy)) {
-    DLOG(WARNING) << "JS message parameter not found: referrerPolicy";
-    return NO;
-  }
-  GURL resolvedURL = targetURL.empty() ?
-      self.defaultURL :
-      GURL(net::GURLWithNSURL(context[web::kOriginURLKey])).Resolve(targetURL);
-  DCHECK(&resolvedURL);
-  web::NewWindowInfo
-      windowInfo(resolvedURL,
-                 windowName,
-                 [self referrerPolicyFromString:referrerPolicy],
-                 [context[web::kUserIsInteractingKey] boolValue]);
-
-  [self openPopupWithInfo:windowInfo];
-  return YES;
-}
-
-- (BOOL)handleWindowStopMessage:(base::DictionaryValue*)message
-                        context:(NSDictionary*)context {
-  NSString* windowName = [self windowNameFromMessage:message
-                                             context:context];
-  if (!windowName)
-    return NO;
-  [[self scriptingInterfaceForWindowNamed:windowName] stopLoading];
-  return YES;
-}
-
-- (BOOL)handleWindowUnloadMessage:(base::DictionaryValue*)message
-                          context:(NSDictionary*)context {
-  [self setPageChangeProbability:web::PAGE_CHANGE_PROBABILITY_VERY_HIGH];
-  return YES;
-}
-
-#pragma mark Private methods
-
-- (BOOL)isDefaultPage {
-  if ([[self stringByEvaluatingJavaScriptFromString:@"document._defaultPage"]
-       isEqualToString:@"true"]) {
-    return self.currentURL == self.defaultURL;
-  }
-  return NO;
-}
-
-- (BOOL)isLinkNavigation:(UIWebViewNavigationType)navigationType {
-  switch (navigationType) {
-    case UIWebViewNavigationTypeLinkClicked:
-      return YES;
-    case UIWebViewNavigationTypeOther:
-      return [self userClickedRecently];
-    default:
-      return NO;
-  }
-}
-
-- (void)setContinuousCheckTimerInterval:(const base::TimeDelta&)interval {
-  // The timer should never be set when there's no web view.
-  DCHECK(_uiWebView);
-
-  BOOL shouldStartTimer =
-      !_continuousCheckTimer.get() || _continuousCheckTimer->IsRunning();
-  base::Closure closure = base::BindBlock(^{
-      // Only perform JS checks if CRWWebController is not already in JavaScript
-      // context. This is possible when "javascript:..." is executed from
-      // Omnibox and this block is run from the timer.
-      if (!_inJavaScriptContext)
-        [self.recurringTaskDelegate runRecurringTask];
-  });
-  _continuousCheckTimer.reset(
-      new base::Timer(FROM_HERE, interval, closure, true));
-  if (shouldStartTimer)
-    _continuousCheckTimer->Reset();
-  if (_lowerFrequencyTimer &&
-      interval == base::TimeDelta::FromMilliseconds(
-          web::kContinuousCheckIntervalMSLow)) {
-    _lowerFrequencyTimer.reset();
-  }
-}
-
-- (NSString*)stringByEvaluatingJavaScriptFromString:(NSString*)script {
-  if (!_uiWebView)
-    return nil;
-
-  ScopedReentryGuard reentryGuard(&_inJavaScriptContext);
-  return [_uiWebView stringByEvaluatingJavaScriptFromString:script];
-}
-
-- (NSString*)stringByEvaluatingUserJavaScriptFromString:(NSString*)script {
-  [self setUserInteractionRegistered:YES];
-  return [self stringByEvaluatingJavaScriptFromString:script];
-}
-
-- (UIWebView*)createWebView {
-  UIWebView* webView = web::CreateWebView(
-      CGRectZero,
-      self.webStateImpl->GetRequestGroupID(),
-      [self useDesktopUserAgent]);
-
-  // Mark the document object of the default page as such, so that it is not
-  // mistaken for a 'real' page by change detection mechanisms.
-  [webView stringByEvaluatingJavaScriptFromString:
-      @"document._defaultPage = true;"];
-
-  [webView setScalesPageToFit:YES];
-  // Turn off data-detectors. MobileSafari does the same thing.
-  [webView setDataDetectorTypes:UIDataDetectorTypeNone];
-
-  return [webView autorelease];
-}
-
-- (void)setWebView:(UIWebView*)webView {
-  DCHECK_NE(_uiWebView.get(), webView);
-  // Per documentation, must clear the delegate before releasing the UIWebView
-  // to avoid errant dangling pointers.
-  [_uiWebView setDelegate:nil];
-  _uiWebView.reset([webView retain]);
-  [_uiWebView setDelegate:self];
-  // Clear out the trusted URL cache.
-  _lastCorrectURLTime = base::TimeTicks();
-  _cachedURL.first = GURL();
-  // Reset the spoofable state (see declaration comment).
-  // TODO(stuartmorgan): Fix the fact that there's no guarantee that no
-  // navigation has happened before the UIWebView is set here (ideally by
-  // unifying the creation and setting flow).
-  _spoofableRequest = YES;
-
-  if (webView) {
-    _inJavaScriptContext = NO;
-    // Do initial injection even before loading another page, since the window
-    // object is re-used.
-    [self injectEarlyInjectionScripts];
-  } else {
-    _continuousCheckTimer.reset();
-    // This timer exists only to change the frequency of the main timer, so it
-    // should not outlive the main timer.
-    _lowerFrequencyTimer.reset();
-  }
-}
-
-- (void)generateMissingDocumentLifecycleEvents {
-  // The webView can be removed between this method being queued and invoked.
-  if (!self.webView)
-    return;
-  if ([self webViewDocumentType] == web::WEB_VIEW_DOCUMENT_TYPE_GENERIC) {
-    [self documentPresent];
-    [self didFinishNavigation];
-  }
-}
-
-- (void)generateMissingLoadRequestWithURL:(const GURL&)currentURL
-                                 referrer:(const web::Referrer&)referrer {
-  [self loadCancelled];
-  // Initialize transition based on whether the request is user-initiated or
-  // not. This is a best guess to replace lost transition type informationj.
-  ui::PageTransition transition = self.userInteractionRegistered
-                                      ? ui::PAGE_TRANSITION_LINK
-                                      : ui::PAGE_TRANSITION_CLIENT_REDIRECT;
-  // If the URL agrees with session state, use the session's transition.
-  if (currentURL == [self currentNavigationURL]) {
-    transition = [self currentTransition];
-  }
-
-  [self registerLoadRequest:currentURL referrer:referrer transition:transition];
-}
-
-- (void)registerUserAgent {
-  web::BuildAndRegisterUserAgentForUIWebView(
-      self.webStateImpl->GetRequestGroupID(), [self useDesktopUserAgent]);
-}
-
-- (id<CRWWebControllerScripting>)scriptingInterfaceForWindowNamed:
-    (NSString*)name {
-  if (![self.delegate respondsToSelector:
-        @selector(webController:scriptingInterfaceForWindowNamed:)]) {
-    return nil;
-  }
-  return [self.delegate webController:self
-     scriptingInterfaceForWindowNamed:name];
-}
-
-#pragma mark FullscreenVideo
-
-- (void)moviePlayerDidEnterFullscreen:(NSNotification*)notification {
-  _inFullscreenVideo = YES;
-}
-
-- (void)moviePlayerDidExitFullscreen:(NSNotification*)notification {
-  _inFullscreenVideo = NO;
-}
-
-- (void)exitFullscreenVideo {
-  [self stringByEvaluatingJavaScriptFromString:
-      @"__gCrWeb.exitFullscreenVideo();"];
-}
-
-#pragma mark -
-#pragma mark CRWRecurringTaskDelegate
-
-// Checks for page changes are made continuously.
-- (void)runRecurringTask {
-  if (!self.webView)
-    return;
-
-  [self injectEarlyInjectionScripts];
-  [self checkForUnexpectedURLChange];
-}
-
-#pragma mark -
-#pragma mark CRWRedirectClientDelegate
-
-- (void)wasRedirectedToRequest:(NSURLRequest*)request
-              redirectResponse:(NSURLResponse*)response {
-  // This callback can be received after -close is called; ignore it.
-  if (self.isBeingDestroyed)
-    return;
-
-  // Register the redirected load request if it originated from the main page
-  // load.
-  GURL redirectedURL = net::GURLWithNSURL(response.URL);
-  if ([self currentNavigationURL] == redirectedURL) {
-    [self registerLoadRequest:net::GURLWithNSURL(request.URL)
-                     referrer:[self currentReferrer]
-                   transition:ui::PAGE_TRANSITION_SERVER_REDIRECT];
-  }
-}
-
-#pragma mark -
-#pragma mark UIWebViewDelegate Methods
-
-// Called when a load begins, and for subsequent subpages.
-- (BOOL)webView:(UIWebView*)webView
-    shouldStartLoadWithRequest:(NSURLRequest*)request
-                navigationType:(UIWebViewNavigationType)navigationType {
-  DVLOG(5) << "webViewShouldStartLoadWithRequest "
-           << net::FormatUrlRequestForLogging(request);
-
-  if (self.isBeingDestroyed)
-    return NO;
-
-  GURL url = net::GURLWithNSURL(request.URL);
-
-  // The crwebnull protocol is used where an element requires a URL but it
-  // should not trigger any activity on the WebView.
-  if (url.SchemeIs("crwebnull"))
-    return NO;
-
-  if ([self urlSchemeIsWebInvoke:url]) {
-    [self handleWebInvokeURL:url request:request];
-    return NO;
-  }
-
-  // ##### IMPORTANT NOTE #####
-  // Do not add new code above this line unless you're certain about what you're
-  // doing with respect to JS re-entry.
-  ScopedReentryGuard javaScriptReentryGuard(&_inJavaScriptContext);
-  web::FrameInfo* targetFrame = nullptr;  // No reliable way to get this info.
-  BOOL isLinkClick = [self isLinkNavigation:navigationType];
-  return [self shouldAllowLoadWithRequest:request
-                              targetFrame:targetFrame
-                              isLinkClick:isLinkClick];
-}
-
-// Called at multiple points during a load, such as at the start of loading a
-// page, and every time an iframe loads. Not called again for server-side
-// redirects.
-- (void)webViewDidStartLoad:(UIWebView *)webView {
-  NSURLRequest* request = webView.request;
-  DVLOG(5) << "webViewDidStartLoad "
-           << net::FormatUrlRequestForLogging(request);
-  // |webView:shouldStartLoad| may not be called or called with different URL
-  // and mainDocURL for the request in certain page navigations. There
-  // are at least 2 known page navigations where this occurs, in these cases it
-  // is imperative the URL verification timer is started here.
-  // The 2 known cases are:
-  // 1) A malicious page suppressing core.js injection and calling
-  //    window.history.back() or window.history.forward()
-  // 2) An iframe loading a URL using target=_blank.
-  // TODO(shreyasv): crbug.com/349155. Understand further why this happens
-  // in some case and not in others.
-  if (webView != self.webView) {
-    // This happens sometimes as tests are brought down.
-    // TODO(jimblackler): work out why and fix the problem at source.
-    LOG(WARNING) << " UIWebViewDelegate message received for inactive WebView.";
-    return;
-  }
-  DCHECK(!self.isBeingDestroyed);
-  // Increment the number of pending loads. This will be balanced by either
-  // a |-webViewDidFinishLoad:| or |-webView:didFailLoadWithError:|.
-  ++_loadCount;
-  [self.recurringTaskDelegate runRecurringTask];
-}
-
-// Called when the page (or one of its subframes) finishes loading. This is
-// called multiple times during a page load, with varying frequency depending
-// on the action (going back, loading a page with frames, redirecting).
-// See http://goto/efrmm for a summary of why this is so painful.
-- (void)webViewDidFinishLoad:(UIWebView*)webView {
-  DVLOG(5) << "webViewDidFinishLoad "
-           << net::FormatUrlRequestForLogging(webView.request);
-  DCHECK(!self.isHalted);
-  // Occasionally this delegate is invoked as a side effect during core.js
-  // injection. It is necessary to ensure we do not attempt to start the
-  // injection process a second time.
-  if (!_inJavaScriptContext)
-    [self.recurringTaskDelegate runRecurringTask];
-
-  [self performSelector:@selector(generateMissingDocumentLifecycleEvents)
-             withObject:nil
-             afterDelay:0];
-
-  ++_unloadCount;
-  if ((_loadCount == _unloadCount) && (self.loadPhase != web::LOAD_REQUESTED))
-    [self checkDocumentLoaded];
-}
-
-// Called when there is an error loading the page. Some errors aren't actual
-// errors, but are caused by user actions such as stopping a page load
-// prematurely.
-- (void)webView:(UIWebView*)webView didFailLoadWithError:(NSError*)error {
-  DVLOG(5) << "webViewDidFailLoadWithError "
-           << net::FormatUrlRequestForLogging(webView.request);
-  ++_unloadCount;
-
-  // Under unknown circumstances navigation item can be null. In that case the
-  // state of web/ will not be valid and app will crash. Early return avoid a
-  // crash (crbug.com/411912).
-  if (!self.webStateImpl ||
-      !self.webStateImpl->GetNavigationManagerImpl().GetVisibleItem()) {
-    return;
-  }
-
-  // There's no reliable way to know if a load is for the main frame, so make a
-  // best-effort guess.
-  // |_loadCount| is reset to 0 before starting loading a new page, and is
-  // incremented in each call to |-webViewDidStartLoad:|. The main request
-  // is the first one to be loaded, and thus has a |_loadCount| of 1.
-  // Sub-requests have a |_loadCount| > 1.
-  // An iframe loading after the main page also has a |_loadCount| of 1, as
-  // |_loadCount| is reset at the end of the main page load. In that case,
-  // |loadPhase_| is web::PAGE_LOADED (as opposed to web::PAGE_LOADING for a
-  // main request).
-  const bool isMainFrame = (_loadCount == 1 &&
-                            self.loadPhase != web::PAGE_LOADED);
-  [self handleLoadError:error inMainFrame:isMainFrame];
-}
-
-#pragma mark -
-#pragma mark Testing methods
-
--(id<CRWRecurringTaskDelegate>)recurringTaskDelegate {
-  return _recurringTaskDelegate;
-}
-
-@end
author	eugenebut <eugenebut@chromium.org>	2016-02-25 11:46:51 -0800
committer	Commit bot <commit-bot@chromium.org>	2016-02-25 19:47:42 +0000
commit	f059d0473a3d569a4436ae1d3183f705f42d8d28 (patch)
tree	e5b0341b8cf4bc9898486d93e391cb3fcb2123ba /ios/web
parent	beca427acf0fa6eafce4778d7a9eb913eebb6c77 (diff)
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