Introduce WebViewGuestDelegate.

BUG=352290

Review URL: https://codereview.chromium.org/481003002

Cr-Commit-Position: refs/heads/master@{#291002}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291002 0039d316-1c4b-4281-b951-d872f2087c98

9 files changed, 410 insertions, 206 deletions

diff --git a/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc b/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc
new file mode 100644
index 0000000..8175022
--- /dev/null
+++ b/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.cc
@@ -0,0 +1,204 @@
+// 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.
+
+
+#include "chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h"
+
+#include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
+#include "chrome/browser/favicon/favicon_tab_helper.h"
+#include "chrome/browser/guest_view/web_view/web_view_constants.h"
+#include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
+#include "chrome/browser/ui/pdf/pdf_tab_helper.h"
+#include "chrome/browser/ui/zoom/zoom_controller.h"
+#include "chrome/common/chrome_version_info.h"
+#include "components/renderer_context_menu/context_menu_delegate.h"
+#include "content/public/common/page_zoom.h"
+
+#if defined(ENABLE_PRINTING)
+#if defined(ENABLE_FULL_PRINTING)
+#include "chrome/browser/printing/print_preview_message_handler.h"
+#include "chrome/browser/printing/print_view_manager.h"
+#else
+#include "chrome/browser/printing/print_view_manager_basic.h"
+#endif  // defined(ENABLE_FULL_PRINTING)
+#endif  // defined(ENABLE_PRINTING)
+
+ChromeWebViewGuestDelegate::ChromeWebViewGuestDelegate(
+    extensions::WebViewGuest* web_view_guest)
+  : WebViewGuestDelegate(),
+    pending_context_menu_request_id_(0),
+    chromevox_injected_(false),
+    current_zoom_factor_(1.0),
+    web_view_guest_(web_view_guest) {
+}
+
+ChromeWebViewGuestDelegate::~ChromeWebViewGuestDelegate() {
+}
+
+double ChromeWebViewGuestDelegate::GetZoom() {
+  return current_zoom_factor_;
+}
+
+bool ChromeWebViewGuestDelegate::HandleContextMenu(
+    const content::ContextMenuParams& params) {
+  ContextMenuDelegate* menu_delegate =
+      ContextMenuDelegate::FromWebContents(guest_web_contents());
+  DCHECK(menu_delegate);
+
+  pending_menu_ = menu_delegate->BuildMenu(guest_web_contents(), params);
+
+  // Pass it to embedder.
+  int request_id = ++pending_context_menu_request_id_;
+  scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
+  scoped_ptr<base::ListValue> items =
+      MenuModelToValue(pending_menu_->menu_model());
+  args->Set(webview::kContextMenuItems, items.release());
+  args->SetInteger(webview::kRequestId, request_id);
+  web_view_guest_->DispatchEventToEmbedder(
+      new extensions::GuestViewBase::Event(
+          webview::kEventContextMenu, args.Pass()));
+  return true;
+}
+
+// TODO(hanxi) Investigate which of these observers should move to the
+// extension module in the future.
+void ChromeWebViewGuestDelegate::OnAttachWebViewHelpers(
+    content::WebContents* contents) {
+  // Create a zoom controller for the guest contents give it access to
+  // GetZoomLevel() and and SetZoomLevel() in WebViewGuest.
+  // TODO(wjmaclean) This currently uses the same HostZoomMap as the browser
+  // context, but we eventually want to isolate the guest contents from zoom
+  // changes outside the guest (e.g. in the main browser), so we should
+  // create a separate HostZoomMap for the guest.
+  ZoomController::CreateForWebContents(contents);
+
+  FaviconTabHelper::CreateForWebContents(contents);
+  extensions::ChromeExtensionWebContentsObserver::
+      CreateForWebContents(contents);
+#if defined(ENABLE_PRINTING)
+#if defined(ENABLE_FULL_PRINTING)
+  printing::PrintViewManager::CreateForWebContents(contents);
+  printing::PrintPreviewMessageHandler::CreateForWebContents(contents);
+#else
+  printing::PrintViewManagerBasic::CreateForWebContents(contents);
+#endif  // defined(ENABLE_FULL_PRINTING)
+#endif  // defined(ENABLE_PRINTING)
+  PDFTabHelper::CreateForWebContents(contents);
+}
+
+void ChromeWebViewGuestDelegate::OnDidCommitProvisionalLoadForFrame(
+    bool is_main_frame) {
+  // Update the current zoom factor for the new page.
+  ZoomController* zoom_controller =
+      ZoomController::FromWebContents(guest_web_contents());
+  DCHECK(zoom_controller);
+  current_zoom_factor_ = zoom_controller->GetZoomLevel();
+  if (is_main_frame)
+    chromevox_injected_ = false;
+}
+
+void ChromeWebViewGuestDelegate::OnDidInitialize() {
+#if defined(OS_CHROMEOS)
+  chromeos::AccessibilityManager* accessibility_manager =
+      chromeos::AccessibilityManager::Get();
+  CHECK(accessibility_manager);
+  accessibility_subscription_ = accessibility_manager->RegisterCallback(
+      base::Bind(&ChromeWebViewGuestDelegate::OnAccessibilityStatusChanged,
+                 base::Unretained(this)));
+#endif
+}
+
+void ChromeWebViewGuestDelegate::OnDocumentLoadedInFrame(
+    content::RenderFrameHost* render_frame_host) {
+  if (!render_frame_host->GetParent())
+    InjectChromeVoxIfNeeded(render_frame_host->GetRenderViewHost());
+}
+
+void ChromeWebViewGuestDelegate::OnGuestDestroyed() {
+  // Clean up custom context menu items for this guest.
+  extensions::MenuManager* menu_manager = extensions::MenuManager::Get(
+      Profile::FromBrowserContext(web_view_guest_->browser_context()));
+  menu_manager->RemoveAllContextItems(extensions::MenuItem::ExtensionKey(
+      web_view_guest_->embedder_extension_id(),
+      web_view_guest_->view_instance_id()));
+}
+
+// static
+scoped_ptr<base::ListValue> ChromeWebViewGuestDelegate::MenuModelToValue(
+    const ui::SimpleMenuModel& menu_model) {
+  scoped_ptr<base::ListValue> items(new base::ListValue());
+  for (int i = 0; i < menu_model.GetItemCount(); ++i) {
+    base::DictionaryValue* item_value = new base::DictionaryValue();
+    // TODO(lazyboy): We need to expose some kind of enum equivalent of
+    // |command_id| instead of plain integers.
+    item_value->SetInteger(webview::kMenuItemCommandId,
+                           menu_model.GetCommandIdAt(i));
+    item_value->SetString(webview::kMenuItemLabel, menu_model.GetLabelAt(i));
+    items->Append(item_value);
+  }
+  return items.Pass();
+}
+
+void ChromeWebViewGuestDelegate::OnSetZoom(double zoom_factor) {
+  ZoomController* zoom_controller =
+      ZoomController::FromWebContents(guest_web_contents());
+  DCHECK(zoom_controller);
+  double zoom_level = content::ZoomFactorToZoomLevel(zoom_factor);
+  zoom_controller->SetZoomLevel(zoom_level);
+
+  scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
+  args->SetDouble(webview::kOldZoomFactor, current_zoom_factor_);
+  args->SetDouble(webview::kNewZoomFactor, zoom_factor);
+  web_view_guest_->DispatchEventToEmbedder(
+      new extensions::GuestViewBase::Event(
+          webview::kEventZoomChange, args.Pass()));
+  current_zoom_factor_ = zoom_factor;
+}
+
+void ChromeWebViewGuestDelegate::OnShowContextMenu(
+    int request_id,
+    const MenuItemVector* items) {
+  if (!pending_menu_.get())
+    return;
+
+  // Make sure this was the correct request.
+  if (request_id != pending_context_menu_request_id_)
+    return;
+
+  // TODO(lazyboy): Implement.
+  DCHECK(!items);
+
+  ContextMenuDelegate* menu_delegate =
+      ContextMenuDelegate::FromWebContents(guest_web_contents());
+  menu_delegate->ShowMenu(pending_menu_.Pass());
+}
+
+void ChromeWebViewGuestDelegate::InjectChromeVoxIfNeeded(
+    content::RenderViewHost* render_view_host) {
+#if defined(OS_CHROMEOS)
+  if (!chromevox_injected_) {
+    chromeos::AccessibilityManager* manager =
+        chromeos::AccessibilityManager::Get();
+    if (manager && manager->IsSpokenFeedbackEnabled()) {
+      manager->InjectChromeVox(render_view_host);
+      chromevox_injected_ = true;
+    }
+  }
+#endif
+}
+
+#if defined(OS_CHROMEOS)
+void ChromeWebViewGuestDelegate::OnAccessibilityStatusChanged(
+    const chromeos::AccessibilityStatusEventDetails& details) {
+  if (details.notification_type == chromeos::ACCESSIBILITY_MANAGER_SHUTDOWN) {
+    accessibility_subscription_.reset();
+  } else if (details.notification_type ==
+      chromeos::ACCESSIBILITY_TOGGLE_SPOKEN_FEEDBACK) {
+    if (details.enabled)
+      InjectChromeVoxIfNeeded(guest_web_contents()->GetRenderViewHost());
+    else
+      chromevox_injected_ = false;
+  }
+}
+#endif
diff --git a/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h b/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h
new file mode 100644
index 0000000..6c1901a
--- /dev/null
+++ b/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h
@@ -0,0 +1,85 @@
+// 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 CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_
+#define CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_
+
+#include "chrome/browser/guest_view/web_view/web_view_guest.h"
+#include "extensions/browser/guest_view/web_view/web_view_guest_delegate.h"
+
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
+#endif
+
+class RenderViewContextMenu;
+
+namespace ui {
+class SimpleMenuModel;
+}  // namespace ui
+
+class ChromeWebViewGuestDelegate : public extensions::WebViewGuestDelegate {
+ public :
+  explicit ChromeWebViewGuestDelegate(
+      extensions::WebViewGuest* web_view_guest);
+  virtual ~ChromeWebViewGuestDelegate();
+
+  // WebViewGuestDelegate implementation.
+  virtual double GetZoom() OVERRIDE;
+  virtual bool HandleContextMenu(
+      const content::ContextMenuParams& params) OVERRIDE;
+  virtual void OnAttachWebViewHelpers(content::WebContents* contents) OVERRIDE;
+  virtual void OnDidCommitProvisionalLoadForFrame(bool is_main_frame) OVERRIDE;
+  virtual void OnDidInitialize() OVERRIDE;
+  virtual void OnDocumentLoadedInFrame(
+      content::RenderFrameHost* render_frame_host) OVERRIDE;
+  virtual void OnGuestDestroyed() OVERRIDE;
+  virtual void OnSetZoom(double zoom_factor) OVERRIDE;
+  virtual void OnShowContextMenu(
+      int request_id,
+      const MenuItemVector* items) OVERRIDE;
+
+ private:
+  content::WebContents* guest_web_contents() const {
+    return web_view_guest_->guest_web_contents();
+  }
+
+  // Returns the top level items (ignoring submenus) as Value.
+  static scoped_ptr<base::ListValue> MenuModelToValue(
+      const ui::SimpleMenuModel& menu_model);
+
+  void InjectChromeVoxIfNeeded(content::RenderViewHost* render_view_host);
+
+#if defined(OS_CHROMEOS)
+  // Notification of a change in the state of an accessibility setting.
+  void OnAccessibilityStatusChanged(
+      const chromeos::AccessibilityStatusEventDetails& details);
+#endif
+
+  // A counter to generate a unique request id for a context menu request.
+  // We only need the ids to be unique for a given WebViewGuest.
+  int pending_context_menu_request_id_;
+
+  // Set to |true| if ChromeVox was already injected in main frame.
+  bool chromevox_injected_;
+
+  // Stores the current zoom factor.
+  double current_zoom_factor_;
+
+  // Holds the RenderViewContextMenu that has been built but yet to be
+  // shown. This is .Reset() after ShowContextMenu().
+  scoped_ptr<RenderViewContextMenu> pending_menu_;
+
+  extensions::WebViewGuest* web_view_guest_;
+
+#if defined(OS_CHROMEOS)
+  // Subscription to receive notifications on changes to a11y settings.
+  scoped_ptr<chromeos::AccessibilityStatusSubscription>
+      accessibility_subscription_;
+#endif
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeWebViewGuestDelegate);
+};
+
+#endif  // CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_CHROME_WEB_VIEW_GUEST_DELEGATE_H_
+
diff --git a/chrome/browser/guest_view/web_view/web_view_guest.cc b/chrome/browser/guest_view/web_view/web_view_guest.cc
index 504e799..cc241d9 100644
--- a/chrome/browser/guest_view/web_view/web_view_guest.cc
+++ b/chrome/browser/guest_view/web_view/web_view_guest.cc
@@ -7,22 +7,13 @@
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
-#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/web_request/web_request_api.h"
 #include "chrome/browser/extensions/api/web_view/web_view_internal_api.h"
-#include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
-#include "chrome/browser/extensions/menu_manager.h"
-#include "chrome/browser/favicon/favicon_tab_helper.h"
+#include "chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h"
 #include "chrome/browser/guest_view/web_view/web_view_constants.h"
 #include "chrome/browser/guest_view/web_view/web_view_permission_helper.h"
 #include "chrome/browser/guest_view/web_view/web_view_permission_types.h"
 #include "chrome/browser/guest_view/web_view/web_view_renderer_state.h"
-#include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
-#include "chrome/browser/ui/pdf/pdf_tab_helper.h"
-#include "chrome/browser/ui/zoom/zoom_controller.h"
-#include "chrome/common/chrome_version_info.h"
-#include "chrome/common/render_messages.h"
-#include "components/renderer_context_menu/context_menu_delegate.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/native_web_keyboard_event.h"
@@ -55,19 +46,6 @@
 #include "third_party/WebKit/public/web/WebFindOptions.h"
 #include "ui/base/models/simple_menu_model.h"
 
-#if defined(ENABLE_PRINTING)
-#if defined(ENABLE_FULL_PRINTING)
-#include "chrome/browser/printing/print_preview_message_handler.h"
-#include "chrome/browser/printing/print_view_manager.h"
-#else
-#include "chrome/browser/printing/print_view_manager_basic.h"
-#endif  // defined(ENABLE_FULL_PRINTING)
-#endif  // defined(ENABLE_PRINTING)
-
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
-#endif
-
 using base::UserMetricsAction;
 using content::RenderFrameHost;
 using content::ResourceType;
@@ -209,22 +187,6 @@ int WebViewGuest::GetViewInstanceId(WebContents* contents) {
   return guest->view_instance_id();
 }
 
-// static
-scoped_ptr<base::ListValue> WebViewGuest::MenuModelToValue(
-    const ui::SimpleMenuModel& menu_model) {
-  scoped_ptr<base::ListValue> items(new base::ListValue());
-  for (int i = 0; i < menu_model.GetItemCount(); ++i) {
-    base::DictionaryValue* item_value = new base::DictionaryValue();
-    // TODO(lazyboy): We need to expose some kind of enum equivalent of
-    // |command_id| instead of plain integers.
-    item_value->SetInteger(webview::kMenuItemCommandId,
-                           menu_model.GetCommandIdAt(i));
-    item_value->SetString(webview::kMenuItemLabel, menu_model.GetLabelAt(i));
-    items->Append(item_value);
-  }
-  return items.Pass();
-}
-
 const char* WebViewGuest::GetAPINamespace() {
   return webview::kAPINamespace;
 }
@@ -345,38 +307,14 @@ void WebViewGuest::DidInitialize() {
       this, content::NOTIFICATION_RESOURCE_RECEIVED_REDIRECT,
       content::Source<WebContents>(guest_web_contents()));
 
-#if defined(OS_CHROMEOS)
-  chromeos::AccessibilityManager* accessibility_manager =
-      chromeos::AccessibilityManager::Get();
-  CHECK(accessibility_manager);
-  accessibility_subscription_ = accessibility_manager->RegisterCallback(
-      base::Bind(&WebViewGuest::OnAccessibilityStatusChanged,
-                 base::Unretained(this)));
-#endif
-
+  if (web_view_guest_delegate_)
+    web_view_guest_delegate_->OnDidInitialize();
   AttachWebViewHelpers(guest_web_contents());
 }
 
 void WebViewGuest::AttachWebViewHelpers(WebContents* contents) {
-  // Create a zoom controller for the guest contents give it access to
-  // GetZoomLevel() and and SetZoomLevel() in WebViewGuest.
-  // TODO(wjmaclean) This currently uses the same HostZoomMap as the browser
-  // context, but we eventually want to isolate the guest contents from zoom
-  // changes outside the guest (e.g. in the main browser), so we should
-  // create a separate HostZoomMap for the guest.
-  ZoomController::CreateForWebContents(contents);
-
-  FaviconTabHelper::CreateForWebContents(contents);
-  ChromeExtensionWebContentsObserver::CreateForWebContents(contents);
-#if defined(ENABLE_PRINTING)
-#if defined(ENABLE_FULL_PRINTING)
-  printing::PrintViewManager::CreateForWebContents(contents);
-  printing::PrintPreviewMessageHandler::CreateForWebContents(contents);
-#else
-  printing::PrintViewManagerBasic::CreateForWebContents(contents);
-#endif  // defined(ENABLE_FULL_PRINTING)
-#endif  // defined(ENABLE_PRINTING)
-  PDFTabHelper::CreateForWebContents(contents);
+  if (web_view_guest_delegate_)
+    web_view_guest_delegate_->OnAttachWebViewHelpers(contents);
   web_view_permission_helper_.reset(new WebViewPermissionHelper(this));
 }
 
@@ -406,11 +344,8 @@ void WebViewGuest::EmbedderDestroyed() {
 
 void WebViewGuest::GuestDestroyed() {
   // Clean up custom context menu items for this guest.
-  MenuManager* menu_manager = MenuManager::Get(
-      Profile::FromBrowserContext(browser_context()));
-  menu_manager->RemoveAllContextItems(MenuItem::ExtensionKey(
-      embedder_extension_id(), view_instance_id()));
-
+  if (web_view_guest_delegate_)
+    web_view_guest_delegate_->OnGuestDestroyed();
   RemoveWebViewStateFromIOThread(web_contents());
 }
 
@@ -480,22 +415,9 @@ void WebViewGuest::FindReply(WebContents* source,
 
 bool WebViewGuest::HandleContextMenu(
     const content::ContextMenuParams& params) {
-  ContextMenuDelegate* menu_delegate =
-      ContextMenuDelegate::FromWebContents(guest_web_contents());
-  DCHECK(menu_delegate);
-
-  pending_menu_ = menu_delegate->BuildMenu(guest_web_contents(), params);
-
-  // Pass it to embedder.
-  int request_id = ++pending_context_menu_request_id_;
-  scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
-  scoped_ptr<base::ListValue> items =
-      MenuModelToValue(pending_menu_->menu_model());
-  args->Set(webview::kContextMenuItems, items.release());
-  args->SetInteger(webview::kRequestId, request_id);
-  DispatchEventToEmbedder(
-      new GuestViewBase::Event(webview::kEventContextMenu, args.Pass()));
-  return true;
+  if (!web_view_guest_delegate_)
+    return false;
+  return web_view_guest_delegate_->HandleContextMenu(params);
 }
 
 void WebViewGuest::HandleKeyboardEvent(
@@ -634,7 +556,9 @@ void WebViewGuest::Observe(int type,
 }
 
 double WebViewGuest::GetZoom() {
-  return current_zoom_factor_;
+  if (!web_view_guest_delegate_)
+    return 1.0;
+  return web_view_guest_delegate_->GetZoom();
 }
 
 void WebViewGuest::Find(
@@ -709,12 +633,10 @@ bool WebViewGuest::ClearData(const base::Time remove_since,
 WebViewGuest::WebViewGuest(content::BrowserContext* browser_context,
                            int guest_instance_id)
     : GuestView<WebViewGuest>(browser_context, guest_instance_id),
-      pending_context_menu_request_id_(0),
       is_overriding_user_agent_(false),
-      chromevox_injected_(false),
-      current_zoom_factor_(1.0),
       find_helper_(this),
       javascript_dialog_helper_(this) {
+  web_view_guest_delegate_.reset(new ChromeWebViewGuestDelegate(this));
 }
 
 WebViewGuest::~WebViewGuest() {
@@ -737,15 +659,10 @@ void WebViewGuest::DidCommitProvisionalLoadForFrame(
       guest_web_contents()->GetRenderProcessHost()->GetID());
   DispatchEventToEmbedder(
       new GuestViewBase::Event(webview::kEventLoadCommit, args.Pass()));
-
-  // Update the current zoom factor for the new page.
-  ZoomController* zoom_controller =
-      ZoomController::FromWebContents(guest_web_contents());
-  DCHECK(zoom_controller);
-  current_zoom_factor_ = zoom_controller->GetZoomLevel();
-
-  if (!render_frame_host->GetParent())
-    chromevox_injected_ = false;
+  if (web_view_guest_delegate_) {
+    web_view_guest_delegate_->OnDidCommitProvisionalLoadForFrame(
+        !render_frame_host->GetParent());
+  }
 }
 
 void WebViewGuest::DidFailProvisionalLoad(
@@ -771,8 +688,8 @@ void WebViewGuest::DidStartProvisionalLoadForFrame(
 
 void WebViewGuest::DocumentLoadedInFrame(
     content::RenderFrameHost* render_frame_host) {
-  if (!render_frame_host->GetParent())
-    InjectChromeVoxIfNeeded(render_frame_host->GetRenderViewHost());
+  if (web_view_guest_delegate_)
+    web_view_guest_delegate_->OnDocumentLoadedInFrame(render_frame_host);
 }
 
 bool WebViewGuest::OnMessageReceived(const IPC::Message& message,
@@ -975,35 +892,6 @@ void WebViewGuest::NavigateGuest(const std::string& src) {
                     guest_web_contents());
 }
 
-#if defined(OS_CHROMEOS)
-void WebViewGuest::OnAccessibilityStatusChanged(
-    const chromeos::AccessibilityStatusEventDetails& details) {
-  if (details.notification_type == chromeos::ACCESSIBILITY_MANAGER_SHUTDOWN) {
-    accessibility_subscription_.reset();
-  } else if (details.notification_type ==
-      chromeos::ACCESSIBILITY_TOGGLE_SPOKEN_FEEDBACK) {
-    if (details.enabled)
-      InjectChromeVoxIfNeeded(guest_web_contents()->GetRenderViewHost());
-    else
-      chromevox_injected_ = false;
-  }
-}
-#endif
-
-void WebViewGuest::InjectChromeVoxIfNeeded(
-    content::RenderViewHost* render_view_host) {
-#if defined(OS_CHROMEOS)
-  if (!chromevox_injected_) {
-    chromeos::AccessibilityManager* manager =
-        chromeos::AccessibilityManager::Get();
-    if (manager && manager->IsSpokenFeedbackEnabled()) {
-      manager->InjectChromeVox(render_view_host);
-      chromevox_injected_ = true;
-    }
-  }
-#endif
-}
-
 bool WebViewGuest::HandleKeyboardShortcuts(
     const content::NativeWebKeyboardEvent& event) {
   if (event.type != blink::WebInputEvent::RawKeyDown)
@@ -1066,21 +954,11 @@ void WebViewGuest::SetUpAutoSize() {
               gfx::Size(max_width, max_height));
 }
 
-void WebViewGuest::ShowContextMenu(int request_id,
-                                   const MenuItemVector* items) {
-  if (!pending_menu_.get())
-    return;
-
-  // Make sure this was the correct request.
-  if (request_id != pending_context_menu_request_id_)
-    return;
-
-  // TODO(lazyboy): Implement.
-  DCHECK(!items);
-
-  ContextMenuDelegate* menu_delegate =
-      ContextMenuDelegate::FromWebContents(guest_web_contents());
-  menu_delegate->ShowMenu(pending_menu_.Pass());
+void WebViewGuest::ShowContextMenu(
+    int request_id,
+    const WebViewGuestDelegate::MenuItemVector* items) {
+  if (web_view_guest_delegate_)
+    web_view_guest_delegate_->OnShowContextMenu(request_id, items);
 }
 
 void WebViewGuest::SetName(const std::string& name) {
@@ -1092,19 +970,8 @@ void WebViewGuest::SetName(const std::string& name) {
 }
 
 void WebViewGuest::SetZoom(double zoom_factor) {
-  ZoomController* zoom_controller =
-      ZoomController::FromWebContents(guest_web_contents());
-  DCHECK(zoom_controller);
-  double zoom_level = content::ZoomFactorToZoomLevel(zoom_factor);
-  zoom_controller->SetZoomLevel(zoom_level);
-
-  scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
-  args->SetDouble(webview::kOldZoomFactor, current_zoom_factor_);
-  args->SetDouble(webview::kNewZoomFactor, zoom_factor);
-  DispatchEventToEmbedder(
-      new GuestViewBase::Event(webview::kEventZoomChange, args.Pass()));
-
-  current_zoom_factor_ = zoom_factor;
+  if (web_view_guest_delegate_)
+    web_view_guest_delegate_->OnSetZoom(zoom_factor);
 }
 
 void WebViewGuest::AddNewContents(content::WebContents* source,
diff --git a/chrome/browser/guest_view/web_view/web_view_guest.h b/chrome/browser/guest_view/web_view/web_view_guest.h
index dd9bb86..e409caf 100644
--- a/chrome/browser/guest_view/web_view/web_view_guest.h
+++ b/chrome/browser/guest_view/web_view/web_view_guest.h
@@ -17,23 +17,12 @@
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/guest_view/guest_view.h"
+#include "extensions/browser/guest_view/web_view/web_view_guest_delegate.h"
 #include "extensions/browser/script_executor.h"
 #include "third_party/WebKit/public/web/WebFindOptions.h"
 
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
-#endif
-
-class RenderViewContextMenu;
-
-namespace ui {
-class SimpleMenuModel;
-}  // namespace ui
-
 namespace extensions {
 
-namespace webview_api = api::web_view_internal;
-
 class WebViewInternalFindFunction;
 
 // A WebViewGuest provides the browser-side implementation of the <webview> API
@@ -69,12 +58,13 @@ class WebViewGuest : public GuestView<WebViewGuest>,
   // Request navigating the guest to the provided |src| URL.
   void NavigateGuest(const std::string& src);
 
-  typedef std::vector<linked_ptr<webview_api::ContextMenuItem> > MenuItemVector;
   // Shows the context menu for the guest.
   // |items| acts as a filter. This restricts the current context's default
   // menu items to contain only the items from |items|.
   // |items| == NULL means no filtering will be applied.
-  void ShowContextMenu(int request_id, const MenuItemVector* items);
+  void ShowContextMenu(
+      int request_id,
+      const WebViewGuestDelegate::MenuItemVector* items);
 
   // Sets the frame name of the guest.
   void SetName(const std::string& name);
@@ -243,10 +233,6 @@ class WebViewGuest : public GuestView<WebViewGuest>,
 
   virtual ~WebViewGuest();
 
-  // Returns the top level items (ignoring submenus) as Value.
-  static scoped_ptr<base::ListValue> MenuModelToValue(
-      const ui::SimpleMenuModel& menu_model);
-
   void AttachWebViewHelpers(content::WebContents* contents);
 
   void OnWebViewNewWindowResponse(int new_window_instance_id,
@@ -291,14 +277,6 @@ class WebViewGuest : public GuestView<WebViewGuest>,
   static void RemoveWebViewStateFromIOThread(
       content::WebContents* web_contents);
 
-#if defined(OS_CHROMEOS)
-  // Notification of a change in the state of an accessibility setting.
-  void OnAccessibilityStatusChanged(
-    const chromeos::AccessibilityStatusEventDetails& details);
-#endif
-
-  void InjectChromeVoxIfNeeded(content::RenderViewHost* render_view_host);
-
   void LoadURLWithParams(const GURL& url,
                          const content::Referrer& referrer,
                          content::PageTransition transition_type,
@@ -340,19 +318,9 @@ class WebViewGuest : public GuestView<WebViewGuest>,
 
   content::NotificationRegistrar notification_registrar_;
 
-  // A counter to generate a unique request id for a context menu request.
-  // We only need the ids to be unique for a given WebViewGuest.
-  int pending_context_menu_request_id_;
-
   // True if the user agent is overridden.
   bool is_overriding_user_agent_;
 
-  // Set to |true| if ChromeVox was already injected in main frame.
-  bool chromevox_injected_;
-
-  // Stores the current zoom factor.
-  double current_zoom_factor_;
-
   // Stores the window name of the main frame of the guest.
   std::string name_;
 
@@ -365,19 +333,11 @@ class WebViewGuest : public GuestView<WebViewGuest>,
   // Handels permission requests.
   scoped_ptr<WebViewPermissionHelper> web_view_permission_helper_;
 
+  scoped_ptr<WebViewGuestDelegate> web_view_guest_delegate_;
+
   friend void WebViewFindHelper::DispatchFindUpdateEvent(bool canceled,
                                                          bool final_update);
 
-  // Holds the RenderViewContextMenu that has been built but yet to be
-  // shown. This is .Reset() after ShowContextMenu().
-  scoped_ptr<RenderViewContextMenu> pending_menu_;
-
-#if defined(OS_CHROMEOS)
-  // Subscription to receive notifications on changes to a11y settings.
-  scoped_ptr<chromeos::AccessibilityStatusSubscription>
-      accessibility_subscription_;
-#endif
-
   // Tracks the name, and target URL of the new window. Once the first
   // navigation commits, we no longer track this information.
   struct NewWindowInfo {
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 2df0bdf..3e314ea 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -1486,6 +1486,8 @@
       'browser/guest_view/extension_options/extension_options_guest.h',
       'browser/guest_view/web_view/chrome_web_view_permission_helper_delegate.cc',
       'browser/guest_view/web_view/chrome_web_view_permission_helper_delegate.h',
+      'browser/guest_view/web_view/chrome_web_view_guest_delegate.cc',
+      'browser/guest_view/web_view/chrome_web_view_guest_delegate.h',
       'browser/guest_view/web_view/context_menu_content_type_web_view.cc',
       'browser/guest_view/web_view/context_menu_content_type_web_view.h',
       'browser/guest_view/web_view/javascript_dialog_helper.cc',
diff --git a/extensions/browser/guest_view/DEPS b/extensions/browser/guest_view/DEPS
new file mode 100644
index 0000000..0573d42
--- /dev/null
+++ b/extensions/browser/guest_view/DEPS
@@ -0,0 +1,3 @@
+include_rules = [
+  "+chrome/common/extensions/api/web_view_internal.h"
+]
diff --git a/extensions/browser/guest_view/web_view/web_view_guest_delegate.cc b/extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
new file mode 100644
index 0000000..d651212
--- /dev/null
+++ b/extensions/browser/guest_view/web_view/web_view_guest_delegate.cc
@@ -0,0 +1,15 @@
+// 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.
+
+#include "extensions/browser/guest_view/web_view/web_view_guest_delegate.h"
+
+namespace extensions {
+
+WebViewGuestDelegate::WebViewGuestDelegate() {
+}
+
+WebViewGuestDelegate::~WebViewGuestDelegate() {
+}
+
+}  // namespace extensions
diff --git a/extensions/browser/guest_view/web_view/web_view_guest_delegate.h b/extensions/browser/guest_view/web_view/web_view_guest_delegate.h
new file mode 100644
index 0000000..01152b0
--- /dev/null
+++ b/extensions/browser/guest_view/web_view/web_view_guest_delegate.h
@@ -0,0 +1,66 @@
+// 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 EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_
+#define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_
+
+#include "chrome/common/extensions/api/web_view_internal.h"
+#include "extensions/browser/guest_view/guest_view_base.h"
+
+namespace content {
+class RenderViewHost;
+class WebContents;
+}
+
+namespace extensions {
+
+namespace webview_api = api::web_view_internal;
+
+// A delegate class of WebViewGuest that are not a part of chrome.
+class WebViewGuestDelegate {
+ public :
+  WebViewGuestDelegate();
+  virtual ~WebViewGuestDelegate();
+
+  typedef std::vector<linked_ptr<webview_api::ContextMenuItem> > MenuItemVector;
+
+  // Returns the current zoom factor.
+  virtual double GetZoom() = 0;
+
+  // Called when context menu operation was handled.
+  virtual bool HandleContextMenu(const content::ContextMenuParams& params) = 0;
+
+  // Called to attach helpers just after additional initialization is performed.
+  virtual void OnAttachWebViewHelpers(content::WebContents* contents) = 0;
+
+  // Called when the guest WebContents commits a provisional load in any frame.
+  virtual void OnDidCommitProvisionalLoadForFrame(bool is_main_frame) = 0;
+
+  // Called just after additional initialization is performed.
+  virtual void OnDidInitialize() = 0;
+
+  virtual void OnDocumentLoadedInFrame(
+      content::RenderFrameHost* render_frame_host) = 0;
+
+  // Called immediately after the guest WebContents has been destroyed.
+  virtual void OnGuestDestroyed() = 0;
+
+  // Called when to set the zoom factor.
+  virtual void OnSetZoom(double zoom_factor) = 0;
+
+  // Shows the context menu for the guest.
+  // |items| acts as a filter. This restricts the current context's default
+  // menu items to contain only the items from |items|.
+  // |items| == NULL means no filtering will be applied.
+  virtual void OnShowContextMenu(
+      int request_id,
+      const MenuItemVector* items) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebViewGuestDelegate);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_DELEGATE_H_
diff --git a/extensions/extensions.gyp b/extensions/extensions.gyp
index ed6757d..83d8fe1 100644
--- a/extensions/extensions.gyp
+++ b/extensions/extensions.gyp
@@ -470,6 +470,8 @@
         'browser/guest_view/guest_view.h',
         'browser/guest_view/web_view/web_view_permission_helper_delegate.cc',
         'browser/guest_view/web_view/web_view_permission_helper_delegate.h',
+        'browser/guest_view/web_view/web_view_guest_delegate.cc',
+        'browser/guest_view/web_view/web_view_guest_delegate.h',
         'browser/image_loader.cc',
         'browser/image_loader.h',
         'browser/image_loader_factory.cc',