Mac content shell: HTTP auth.

BUG=120526
TEST=HTTP auth works

Review URL: https://chromiumcodereview.appspot.com/9980002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@130918 0039d316-1c4b-4281-b951-d872f2087c98

11 files changed, 773 insertions, 6 deletions

diff --git a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
index 23131e2b..4da7944 100644
--- a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
+++ b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
@@ -255,7 +255,7 @@ ResourceDispatcherHostLoginDelegate*
     ChromeResourceDispatcherHostDelegate::CreateLoginDelegate(
         net::AuthChallengeInfo* auth_info, net::URLRequest* request) {
   std::string instant_header_value;
-  // For instant, return a NULl delegate. Auth navigations don't commit the load
+  // For instant, return a NULL delegate. Auth navigations don't commit the load
   // (the load remains pending) until the user cancels or succeeds in
   // authorizing. Since we don't allow merging of WebContents with pending loads
   // we disallow auth dialogs from showing during instant. Returning NULL does
diff --git a/content/content_shell.gypi b/content/content_shell.gypi
index d2ee56c..8e8c7be 100644
--- a/content/content_shell.gypi
+++ b/content/content_shell.gypi
@@ -84,6 +84,9 @@
         'shell/shell_javascript_dialog_mac.mm',
         'shell/shell_javascript_dialog_win.cc',
         'shell/shell_javascript_dialog.h',
+        'shell/shell_login_dialog_mac.mm',
+        'shell/shell_login_dialog.cc',
+        'shell/shell_login_dialog.h',
         'shell/shell_main_delegate.cc',
         'shell/shell_main_delegate.h',
         'shell/shell_messages.cc',
@@ -98,6 +101,8 @@
         'shell/shell_render_view_observer.h',
         'shell/shell_resource_context.cc',
         'shell/shell_resource_context.h',
+        'shell/shell_resource_dispatcher_host_delegate.cc',
+        'shell/shell_resource_dispatcher_host_delegate.h',
         'shell/shell_switches.cc',
         'shell/shell_switches.h',
         'shell/shell_url_request_context_getter.cc',
@@ -365,6 +370,7 @@
           'product_name': '<(content_shell_product_name) Framework',
           'mac_bundle': 1,
           'mac_bundle_resources': [
+            'shell/mac/English.lproj/HttpAuth.xib',
             'shell/mac/English.lproj/MainMenu.xib',
             '<(PRODUCT_DIR)/content_shell.pak'
           ],
diff --git a/content/public/browser/resource_dispatcher_host_login_delegate.h b/content/public/browser/resource_dispatcher_host_login_delegate.h
index 4701240..0d99edb 100644
--- a/content/public/browser/resource_dispatcher_host_login_delegate.h
+++ b/content/public/browser/resource_dispatcher_host_login_delegate.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -12,15 +12,17 @@
 
 namespace content {
 
-// Interface for getting login credentials for HTTP auth requests.  When the
-// implementation has the credentials, it shoudl call the Requests's SetAuth
-// method.
+// Interface for getting login credentials for HTTP auth requests. If the
+// login delegate obtains credentials, it should call the URLRequest's SetAuth
+// method. If the user cancels, the login delegate should call the URLRequest's
+// CancelAuth instead. And in either case, it must make a call to
+// ResourceDispatcherHost::ClearLoginDelegateForRequest.
 class CONTENT_EXPORT ResourceDispatcherHostLoginDelegate
     : public base::RefCountedThreadSafe<ResourceDispatcherHostLoginDelegate> {
  public:
   virtual ~ResourceDispatcherHostLoginDelegate() {}
 
-  // Notify the delegate that the request was cancelled.
+  // Notify the login delegate that the request was cancelled.
   // This function can only be called from the IO thread.
   virtual void OnRequestCancelled() = 0;
 };
diff --git a/content/shell/mac/English.lproj/HttpAuth.xib b/content/shell/mac/English.lproj/HttpAuth.xib
new file mode 100644
index 0000000..2a2ac00
--- /dev/null
+++ b/content/shell/mac/English.lproj/HttpAuth.xib
@@ -0,0 +1,350 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<archive type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="7.10">
+  <data>
+    <int key="IBDocument.SystemTarget">1060</int>
+    <string key="IBDocument.SystemVersion">11D50b</string>
+    <string key="IBDocument.InterfaceBuilderVersion">851</string>
+    <string key="IBDocument.AppKitVersion">1138.32</string>
+    <string key="IBDocument.HIToolboxVersion">568.00</string>
+    <object class="NSMutableDictionary" key="IBDocument.PluginVersions">
+      <string key="NS.key.0">com.apple.InterfaceBuilder.CocoaPlugin</string>
+      <string key="NS.object.0">851</string>
+    </object>
+    <object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
+      <bool key="EncodedWithXMLCoder">YES</bool>
+      <integer value="1"/>
+    </object>
+    <object class="NSArray" key="IBDocument.PluginDependencies">
+      <bool key="EncodedWithXMLCoder">YES</bool>
+      <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+    </object>
+    <object class="NSMutableDictionary" key="IBDocument.Metadata">
+      <bool key="EncodedWithXMLCoder">YES</bool>
+      <object class="NSArray" key="dict.sortedKeys" id="0">
+        <bool key="EncodedWithXMLCoder">YES</bool>
+      </object>
+      <object class="NSMutableArray" key="dict.values">
+        <bool key="EncodedWithXMLCoder">YES</bool>
+      </object>
+    </object>
+    <object class="NSMutableArray" key="IBDocument.RootObjects" id="1000">
+      <bool key="EncodedWithXMLCoder">YES</bool>
+      <object class="NSCustomObject" id="1001">
+        <string key="NSClassName">NSObject</string>
+      </object>
+      <object class="NSCustomObject" id="1003">
+        <string key="NSClassName">FirstResponder</string>
+      </object>
+      <object class="NSCustomObject" id="1004">
+        <string key="NSClassName">NSApplication</string>
+      </object>
+      <object class="NSCustomView" id="1005">
+        <reference key="NSNextResponder"/>
+        <int key="NSvFlags">268</int>
+        <object class="NSMutableArray" key="NSSubviews">
+          <bool key="EncodedWithXMLCoder">YES</bool>
+          <object class="NSSecureTextField" id="870871897">
+            <reference key="NSNextResponder" ref="1005"/>
+            <int key="NSvFlags">268</int>
+            <string key="NSFrame">{{99, 20}, {156, 22}}</string>
+            <reference key="NSSuperview" ref="1005"/>
+            <string key="NSReuseIdentifierKey">_NS:3407</string>
+            <int key="NSTag">2</int>
+            <bool key="NSEnabled">YES</bool>
+            <object class="NSSecureTextFieldCell" key="NSCell" id="789371868">
+              <int key="NSCellFlags">343014976</int>
+              <int key="NSCellFlags2">272630848</int>
+              <string key="NSContents"/>
+              <object class="NSFont" key="NSSupport" id="749592131">
+                <string key="NSName">LucidaGrande</string>
+                <double key="NSSize">13</double>
+                <int key="NSfFlags">1040</int>
+              </object>
+              <string key="NSCellIdentifier">_NS:3407</string>
+              <reference key="NSControlView" ref="870871897"/>
+              <bool key="NSDrawsBackground">YES</bool>
+              <object class="NSColor" key="NSBackgroundColor" id="359621337">
+                <int key="NSColorSpace">6</int>
+                <string key="NSCatalogName">System</string>
+                <string key="NSColorName">textBackgroundColor</string>
+                <object class="NSColor" key="NSColor">
+                  <int key="NSColorSpace">3</int>
+                  <bytes key="NSWhite">MQA</bytes>
+                </object>
+              </object>
+              <object class="NSColor" key="NSTextColor" id="1064189586">
+                <int key="NSColorSpace">6</int>
+                <string key="NSCatalogName">System</string>
+                <string key="NSColorName">textColor</string>
+                <object class="NSColor" key="NSColor" id="976070126">
+                  <int key="NSColorSpace">3</int>
+                  <bytes key="NSWhite">MAA</bytes>
+                </object>
+              </object>
+              <object class="NSArray" key="NSAllowedInputLocales">
+                <bool key="EncodedWithXMLCoder">YES</bool>
+                <string>NSAllRomanInputSourcesLocaleIdentifier</string>
+              </object>
+            </object>
+          </object>
+          <object class="NSTextField" id="249141654">
+            <reference key="NSNextResponder" ref="1005"/>
+            <int key="NSvFlags">268</int>
+            <string key="NSFrame">{{99, 52}, {156, 22}}</string>
+            <reference key="NSSuperview" ref="1005"/>
+            <string key="NSReuseIdentifierKey">_NS:817</string>
+            <int key="NSTag">1</int>
+            <bool key="NSEnabled">YES</bool>
+            <object class="NSTextFieldCell" key="NSCell" id="270667430">
+              <int key="NSCellFlags">-1804468671</int>
+              <int key="NSCellFlags2">272630784</int>
+              <string key="NSContents"/>
+              <reference key="NSSupport" ref="749592131"/>
+              <string key="NSCellIdentifier">_NS:817</string>
+              <reference key="NSControlView" ref="249141654"/>
+              <bool key="NSDrawsBackground">YES</bool>
+              <reference key="NSBackgroundColor" ref="359621337"/>
+              <reference key="NSTextColor" ref="1064189586"/>
+            </object>
+          </object>
+          <object class="NSTextField" id="298854538">
+            <reference key="NSNextResponder" ref="1005"/>
+            <int key="NSvFlags">268</int>
+            <string key="NSFrame">{{17, 22}, {77, 17}}</string>
+            <reference key="NSSuperview" ref="1005"/>
+            <string key="NSReuseIdentifierKey">_NS:4068</string>
+            <bool key="NSEnabled">YES</bool>
+            <object class="NSTextFieldCell" key="NSCell" id="212881775">
+              <int key="NSCellFlags">68288064</int>
+              <int key="NSCellFlags2">71304192</int>
+              <string key="NSContents">Password:</string>
+              <reference key="NSSupport" ref="749592131"/>
+              <string key="NSCellIdentifier">_NS:4068</string>
+              <reference key="NSControlView" ref="298854538"/>
+              <object class="NSColor" key="NSBackgroundColor" id="818604237">
+                <int key="NSColorSpace">6</int>
+                <string key="NSCatalogName">System</string>
+                <string key="NSColorName">controlColor</string>
+                <object class="NSColor" key="NSColor">
+                  <int key="NSColorSpace">3</int>
+                  <bytes key="NSWhite">MC42NjY2NjY2NjY3AA</bytes>
+                </object>
+              </object>
+              <object class="NSColor" key="NSTextColor" id="1040089286">
+                <int key="NSColorSpace">6</int>
+                <string key="NSCatalogName">System</string>
+                <string key="NSColorName">controlTextColor</string>
+                <reference key="NSColor" ref="976070126"/>
+              </object>
+            </object>
+          </object>
+          <object class="NSTextField" id="881326141">
+            <reference key="NSNextResponder" ref="1005"/>
+            <int key="NSvFlags">268</int>
+            <string key="NSFrame">{{17, 54}, {77, 17}}</string>
+            <reference key="NSSuperview" ref="1005"/>
+            <string key="NSReuseIdentifierKey">_NS:4068</string>
+            <bool key="NSEnabled">YES</bool>
+            <object class="NSTextFieldCell" key="NSCell" id="509864529">
+              <int key="NSCellFlags">68288064</int>
+              <int key="NSCellFlags2">71304192</int>
+              <string key="NSContents">Username:</string>
+              <reference key="NSSupport" ref="749592131"/>
+              <string key="NSCellIdentifier">_NS:4068</string>
+              <reference key="NSControlView" ref="881326141"/>
+              <reference key="NSBackgroundColor" ref="818604237"/>
+              <reference key="NSTextColor" ref="1040089286"/>
+            </object>
+          </object>
+        </object>
+        <string key="NSFrameSize">{275, 94}</string>
+        <reference key="NSSuperview"/>
+        <string key="NSClassName">NSView</string>
+      </object>
+    </object>
+    <object class="IBObjectContainer" key="IBDocument.Objects">
+      <object class="NSMutableArray" key="connectionRecords">
+        <bool key="EncodedWithXMLCoder">YES</bool>
+      </object>
+      <object class="IBMutableOrderedSet" key="objectRecords">
+        <object class="NSArray" key="orderedObjects">
+          <bool key="EncodedWithXMLCoder">YES</bool>
+          <object class="IBObjectRecord">
+            <int key="objectID">0</int>
+            <reference key="object" ref="0"/>
+            <reference key="children" ref="1000"/>
+            <nil key="parent"/>
+          </object>
+          <object class="IBObjectRecord">
+            <int key="objectID">-2</int>
+            <reference key="object" ref="1001"/>
+            <reference key="parent" ref="0"/>
+            <string key="objectName">File's Owner</string>
+          </object>
+          <object class="IBObjectRecord">
+            <int key="objectID">-1</int>
+            <reference key="object" ref="1003"/>
+            <reference key="parent" ref="0"/>
+            <string key="objectName">First Responder</string>
+          </object>
+          <object class="IBObjectRecord">
+            <int key="objectID">-3</int>
+            <reference key="object" ref="1004"/>
+            <reference key="parent" ref="0"/>
+            <string key="objectName">Application</string>
+          </object>
+          <object class="IBObjectRecord">
+            <int key="objectID">1</int>
+            <reference key="object" ref="1005"/>
+            <object class="NSMutableArray" key="children">
+              <bool key="EncodedWithXMLCoder">YES</bool>
+              <reference ref="249141654"/>
+              <reference ref="870871897"/>
+              <reference ref="298854538"/>
+              <reference ref="881326141"/>
+            </object>
+            <reference key="parent" ref="0"/>
+          </object>
+          <object class="IBObjectRecord">
+            <int key="objectID">2</int>
+            <reference key="object" ref="881326141"/>
+            <object class="NSMutableArray" key="children">
+              <bool key="EncodedWithXMLCoder">YES</bool>
+              <reference ref="509864529"/>
+            </object>
+            <reference key="parent" ref="1005"/>
+          </object>
+          <object class="IBObjectRecord">
+            <int key="objectID">3</int>
+            <reference key="object" ref="509864529"/>
+            <reference key="parent" ref="881326141"/>
+          </object>
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+            <reference key="object" ref="298854538"/>
+            <object class="NSMutableArray" key="children">
+              <bool key="EncodedWithXMLCoder">YES</bool>
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+            <reference key="parent" ref="1005"/>
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+            <reference key="parent" ref="298854538"/>
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+            <object class="NSMutableArray" key="children">
+              <bool key="EncodedWithXMLCoder">YES</bool>
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+            <reference key="parent" ref="1005"/>
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+            <reference key="parent" ref="249141654"/>
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+            <reference key="object" ref="870871897"/>
+            <object class="NSMutableArray" key="children">
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+            </object>
+            <reference key="parent" ref="1005"/>
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+            <reference key="object" ref="789371868"/>
+            <reference key="parent" ref="870871897"/>
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+        <bool key="EncodedWithXMLCoder">YES</bool>
+        <object class="NSArray" key="dict.sortedKeys">
+          <bool key="EncodedWithXMLCoder">YES</bool>
+          <string>-1.IBPluginDependency</string>
+          <string>-2.IBPluginDependency</string>
+          <string>-3.IBPluginDependency</string>
+          <string>1.IBEditorWindowLastContentRect</string>
+          <string>1.IBPluginDependency</string>
+          <string>1.WindowOrigin</string>
+          <string>1.editorWindowContentRectSynchronizationRect</string>
+          <string>2.IBPluginDependency</string>
+          <string>2.IBViewBoundsToFrameTransform</string>
+          <string>3.IBPluginDependency</string>
+          <string>4.IBPluginDependency</string>
+          <string>4.IBViewBoundsToFrameTransform</string>
+          <string>5.IBPluginDependency</string>
+          <string>6.IBPluginDependency</string>
+          <string>6.IBViewBoundsToFrameTransform</string>
+          <string>7.IBPluginDependency</string>
+          <string>8.IBPluginDependency</string>
+          <string>8.IBViewBoundsToFrameTransform</string>
+          <string>9.IBPluginDependency</string>
+        </object>
+        <object class="NSMutableArray" key="dict.values">
+          <bool key="EncodedWithXMLCoder">YES</bool>
+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <string>{{969, 1048}, {275, 94}}</string>
+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <string>{628, 654}</string>
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+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <object class="NSAffineTransform">
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+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <object class="NSAffineTransform">
+            <bytes key="NSTransformStruct">P4AAAL+AAABBiAAAwiAAAA</bytes>
+          </object>
+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <object class="NSAffineTransform">
+            <bytes key="NSTransformStruct">P4AAAL+AAABCxgAAwpAAAA</bytes>
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+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
+          <object class="NSAffineTransform">
+            <bytes key="NSTransformStruct">P4AAAL+AAABCxgAAwiAAAA</bytes>
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+          <string>com.apple.InterfaceBuilder.CocoaPlugin</string>
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+      <object class="NSMutableDictionary" key="unlocalizedProperties">
+        <bool key="EncodedWithXMLCoder">YES</bool>
+        <reference key="dict.sortedKeys" ref="0"/>
+        <object class="NSMutableArray" key="dict.values">
+          <bool key="EncodedWithXMLCoder">YES</bool>
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+      <nil key="activeLocalization"/>
+      <object class="NSMutableDictionary" key="localizations">
+        <bool key="EncodedWithXMLCoder">YES</bool>
+        <reference key="dict.sortedKeys" ref="0"/>
+        <object class="NSMutableArray" key="dict.values">
+          <bool key="EncodedWithXMLCoder">YES</bool>
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+      </object>
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+      <int key="maxID">9</int>
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+    <object class="IBClassDescriber" key="IBDocument.Classes"/>
+    <int key="IBDocument.localizationMode">0</int>
+    <string key="IBDocument.TargetRuntimeIdentifier">IBCocoaFramework</string>
+    <object class="NSMutableDictionary" key="IBDocument.PluginDeclaredDevelopmentDependencies">
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+    <bool key="IBDocument.PluginDeclaredDependenciesTrackSystemTargetVersion">YES</bool>
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diff --git a/content/shell/shell_content_browser_client.cc b/content/shell/shell_content_browser_client.cc
index 588e002..cdaa0e0 100644
--- a/content/shell/shell_content_browser_client.cc
+++ b/content/shell/shell_content_browser_client.cc
@@ -6,10 +6,12 @@
 
 #include "base/command_line.h"
 #include "base/file_path.h"
+#include "content/public/browser/resource_dispatcher_host.h"
 #include "content/shell/shell.h"
 #include "content/shell/shell_browser_main_parts.h"
 #include "content/shell/shell_devtools_delegate.h"
 #include "content/shell/shell_render_view_host_observer.h"
+#include "content/shell/shell_resource_dispatcher_host_delegate.h"
 #include "content/shell/shell_switches.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ -269,6 +271,10 @@ std::string ShellContentBrowserClient::GetWorkerProcessTitle(
 }
 
 void ShellContentBrowserClient::ResourceDispatcherHostCreated() {
+  resource_dispatcher_host_delegate_.reset(
+      new ShellResourceDispatcherHostDelegate());
+  ResourceDispatcherHost::Get()->SetDelegate(
+      resource_dispatcher_host_delegate_.get());
 }
 
 SpeechRecognitionManagerDelegate*
diff --git a/content/shell/shell_content_browser_client.h b/content/shell/shell_content_browser_client.h
index ac5e472..67f6847 100644
--- a/content/shell/shell_content_browser_client.h
+++ b/content/shell/shell_content_browser_client.h
@@ -16,6 +16,7 @@ namespace content {
 
 class ShellBrowserContext;
 class ShellBrowserMainParts;
+class ShellResourceDispatcherHostDelegate;
 
 class ShellContentBrowserClient : public ContentBrowserClient {
  public:
@@ -189,6 +190,9 @@ class ShellContentBrowserClient : public ContentBrowserClient {
   ShellBrowserContext* browser_context();
 
  private:
+  scoped_ptr<ShellResourceDispatcherHostDelegate>
+      resource_dispatcher_host_delegate_;
+
   ShellBrowserMainParts* shell_browser_main_parts_;
 };
 
diff --git a/content/shell/shell_login_dialog.cc b/content/shell/shell_login_dialog.cc
new file mode 100644
index 0000000..def2ba3
--- /dev/null
+++ b/content/shell/shell_login_dialog.cc
@@ -0,0 +1,107 @@
+// Copyright (c) 2012 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 "content/shell/shell_login_dialog.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/utf_string_conversions.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/resource_dispatcher_host.h"
+#include "net/base/auth.h"
+#include "net/url_request/url_request.h"
+#include "ui/base/text/text_elider.h"
+
+namespace content {
+
+ShellLoginDialog::ShellLoginDialog(
+    net::AuthChallengeInfo* auth_info,
+    net::URLRequest* request) : auth_info_(auth_info),
+                                request_(request) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&ShellLoginDialog::PrepDialog, this,
+                 ASCIIToUTF16(auth_info->challenger.ToString()),
+                 UTF8ToUTF16(auth_info->realm)));
+}
+
+ShellLoginDialog::~ShellLoginDialog() {
+  // Cannot post any tasks here; this object is going away and cannot be
+  // referenced/dereferenced.
+}
+
+void ShellLoginDialog::OnRequestCancelled() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&ShellLoginDialog::PlatformRequestCancelled, this));
+}
+
+void ShellLoginDialog::PrepDialog(const string16& host,
+                                  const string16& realm) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  // The realm is controlled by the remote server, so there is no reason to
+  // believe it is of a reasonable length.
+  string16 elided_realm;
+  ui::ElideString(realm, 120, &elided_realm);
+
+  string16 explanation =
+      ASCIIToUTF16("The server ") + host +
+      ASCIIToUTF16(" requires a username and password.");
+
+  if (!elided_realm.empty()) {
+    explanation += ASCIIToUTF16(" The server says: ");
+    explanation += elided_realm;
+    explanation += ASCIIToUTF16(".");
+  }
+
+  PlatformCreateDialog(explanation);
+}
+
+void ShellLoginDialog::UserAcceptedAuth(const string16& username,
+                                        const string16& password) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&ShellLoginDialog::SendAuthToRequester, this,
+                 true, username, password));
+}
+
+void ShellLoginDialog::UserCancelledAuth() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&ShellLoginDialog::SendAuthToRequester, this,
+                 false, string16(), string16()));
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&ShellLoginDialog::PlatformCleanUp, this));
+}
+
+void ShellLoginDialog::SendAuthToRequester(bool success,
+                                           const string16& username,
+                                           const string16& password) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  if (success)
+    request_->SetAuth(net::AuthCredentials(username, password));
+  else
+    request_->CancelAuth();
+  ResourceDispatcherHost::Get()->ClearLoginDelegateForRequest(request_);
+
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&ShellLoginDialog::PlatformCleanUp, this));
+}
+
+#if !defined(OS_MACOSX)
+// Bogus implementations for linking. They are never called because
+// ResourceDispatcherHostDelegate::CreateLoginDelegate returns NULL.
+// TODO: implement ShellLoginDialog for other platforms, drop this #if
+void ShellLoginDialog::PlatformCreateDialog(const string16& message) {}
+void ShellLoginDialog::PlatformCleanUp() {}
+void ShellLoginDialog::PlatformRequestCancelled() {}
+#endif
+
+}  // namespace content
diff --git a/content/shell/shell_login_dialog.h b/content/shell/shell_login_dialog.h
new file mode 100644
index 0000000..b944c19
--- /dev/null
+++ b/content/shell/shell_login_dialog.h
@@ -0,0 +1,87 @@
+// Copyright (c) 2012 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 CONTENT_SHELL_SHELL_LOGIN_DIALOG_H_
+#define CONTENT_SHELL_SHELL_LOGIN_DIALOG_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "base/string16.h"
+#include "content/public/browser/resource_dispatcher_host_login_delegate.h"
+
+#if defined(OS_MACOSX)
+#if __OBJC__
+@class ShellLoginDialogHelper;
+#else
+class ShellLoginDialogHelper;
+#endif  // __OBJC__
+#endif  // defined(OS_MACOSX)
+
+namespace net {
+class AuthChallengeInfo;
+class URLRequest;
+}
+
+namespace content {
+
+// This class provides a dialog box to ask the user for credentials. Useful in
+// ResourceDispatcherHostDelegate::CreateLoginDelegate.
+class ShellLoginDialog : public ResourceDispatcherHostLoginDelegate {
+ public:
+  // Threading: IO thread.
+  ShellLoginDialog(net::AuthChallengeInfo* auth_info, net::URLRequest* request);
+  // Threading: any
+  virtual ~ShellLoginDialog();
+
+  // ResourceDispatcherHostLoginDelegate implementation:
+  // Threading: IO thread.
+  virtual void OnRequestCancelled() OVERRIDE;
+
+  // Called by the platform specific code when the user responds. Public because
+  // the aforementioned platform specific code may not have access to private
+  // members. Not to be called from client code.
+  // Threading: UI thread.
+  void UserAcceptedAuth(const string16& username, const string16& password);
+  void UserCancelledAuth();
+
+ private:
+  // All the methods that begin with Platform need to be implemented by the
+  // platform specific LoginDialog implementation.
+  // Creates the dialog.
+  // Threading: UI thread.
+  void PlatformCreateDialog(const string16& message);
+  // Called from the destructor to let each platform do any necessary cleanup.
+  // Threading: UI thread.
+  void PlatformCleanUp();
+  // Called from OnRequestCancelled if the request was cancelled.
+  // Threading: UI thread.
+  void PlatformRequestCancelled();
+
+  // Sets up dialog creation.
+  // Threading: UI thread.
+  void PrepDialog(const string16& host, const string16& realm);
+
+  // Sends the authentication to the requester.
+  // Threading: IO thread.
+  void SendAuthToRequester(bool success,
+                           const string16& username,
+                           const string16& password);
+
+  // Who/where/what asked for the authentication.
+  // Threading: IO thread.
+  scoped_refptr<net::AuthChallengeInfo> auth_info_;
+
+  // The request that wants login data.
+  // Threading: IO thread.
+  net::URLRequest* request_;
+
+#if defined(OS_MACOSX)
+  // Threading: UI thread.
+  ShellLoginDialogHelper* helper_;  // owned
+#endif
+};
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_SHELL_LOGIN_DIALOG_H_
diff --git a/content/shell/shell_login_dialog_mac.mm b/content/shell/shell_login_dialog_mac.mm
new file mode 100644
index 0000000..c08892d
--- /dev/null
+++ b/content/shell/shell_login_dialog_mac.mm
@@ -0,0 +1,138 @@
+// Copyright (c) 2012 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 "content/shell/shell_login_dialog.h"
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/logging.h"
+#include "base/mac/bundle_locations.h"
+#import "base/mac/cocoa_protocols.h"
+#import "base/memory/scoped_nsobject.h"
+#include "base/sys_string_conversions.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace {
+
+const int kUsernameFieldTag = 1;
+const int kPasswordFieldTag = 2;
+
+}  // namespace
+
+// Helper object that receives the notification that the dialog/sheet is
+// going away.
+@interface ShellLoginDialogHelper : NSObject<NSAlertDelegate> {
+ @private
+  scoped_nsobject<NSAlert> alert_;
+  NSTextField* usernameField_;  // WEAK; owned by alert_
+  NSSecureTextField* passwordField_;  // WEAK; owned by alert_
+}
+
+- (NSAlert*)alert;
+- (NSView*)accessoryView;
+- (void)focus;
+- (void)alertDidEnd:(NSAlert*)alert
+         returnCode:(int)returnCode
+        contextInfo:(void*)contextInfo;
+- (void)cancel;
+
+@end
+
+@implementation ShellLoginDialogHelper
+
+- (NSAlert*)alert {
+  alert_.reset([[NSAlert alloc] init]);
+  [alert_ setAccessoryView:[self accessoryView]];
+  return alert_;
+}
+
+- (NSView*)accessoryView {
+  scoped_nsobject<NSNib> nib(
+      [[NSNib alloc] initWithNibNamed:@"HttpAuth"
+                               bundle:base::mac::FrameworkBundle()]);
+  if (!nib)
+    return nil;
+
+  NSArray* objects;
+  BOOL success = [nib instantiateNibWithOwner:nil
+                              topLevelObjects:&objects];
+  if (!success)
+    return nil;
+  [objects makeObjectsPerformSelector:@selector(release)];
+
+  for (NSView* view in objects) {
+    if (![view isKindOfClass:[NSView class]])
+      continue;
+
+    usernameField_ = [view viewWithTag:kUsernameFieldTag];
+    passwordField_ = [view viewWithTag:kPasswordFieldTag];
+    return view;
+  }
+
+  return nil;
+}
+
+- (void)focus {
+  [[alert_ window] makeFirstResponder:usernameField_];
+}
+
+- (void)alertDidEnd:(NSAlert*)alert
+         returnCode:(int)returnCode
+        contextInfo:(void*)contextInfo {
+  if (returnCode == NSRunStoppedResponse)
+    return;
+
+  content::ShellLoginDialog* this_dialog =
+      reinterpret_cast<content::ShellLoginDialog*>(contextInfo);
+  if (returnCode == NSAlertFirstButtonReturn) {
+    this_dialog->UserAcceptedAuth(
+        base::SysNSStringToUTF16([usernameField_ stringValue]),
+        base::SysNSStringToUTF16([passwordField_ stringValue]));
+  } else {
+    this_dialog->UserCancelledAuth();
+  }
+}
+
+- (void)cancel {
+  [NSApp endSheet:[alert_ window]];
+  alert_.reset();
+}
+
+@end
+
+namespace content {
+
+void ShellLoginDialog::PlatformCreateDialog(const string16& message) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  helper_ = [[ShellLoginDialogHelper alloc] init];
+
+  // Show the modal dialog.
+  NSAlert* alert = [helper_ alert];
+  [alert setDelegate:helper_];
+  [alert setInformativeText:base::SysUTF16ToNSString(message)];
+  [alert setMessageText:@"Please log in."];
+  [alert addButtonWithTitle:@"OK"];
+  NSButton* other = [alert addButtonWithTitle:@"Cancel"];
+  [other setKeyEquivalent:@"\e"];
+  [alert
+      beginSheetModalForWindow:nil  // nil here makes it app-modal
+                 modalDelegate:helper_
+                didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:)
+                   contextInfo:this];
+
+  [helper_ focus];
+}
+
+void ShellLoginDialog::PlatformCleanUp() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  [helper_ release];
+  helper_ = nil;
+}
+
+void ShellLoginDialog::PlatformRequestCancelled() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  [helper_ cancel];
+}
+
+}  // namespace content
diff --git a/content/shell/shell_resource_dispatcher_host_delegate.cc b/content/shell/shell_resource_dispatcher_host_delegate.cc
new file mode 100644
index 0000000..4fc145b
--- /dev/null
+++ b/content/shell/shell_resource_dispatcher_host_delegate.cc
@@ -0,0 +1,35 @@
+// Copyright (c) 2012 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 "content/shell/shell_resource_dispatcher_host_delegate.h"
+
+#include "content/shell/shell_login_dialog.h"
+
+namespace content {
+
+ShellResourceDispatcherHostDelegate::ShellResourceDispatcherHostDelegate() {
+}
+
+ShellResourceDispatcherHostDelegate::~ShellResourceDispatcherHostDelegate() {
+}
+
+bool ShellResourceDispatcherHostDelegate::AcceptAuthRequest(
+    net::URLRequest* request,
+    net::AuthChallengeInfo* auth_info) {
+  // Why not give it a try?
+  return true;
+}
+
+content::ResourceDispatcherHostLoginDelegate*
+ShellResourceDispatcherHostDelegate::CreateLoginDelegate(
+    net::AuthChallengeInfo* auth_info, net::URLRequest* request) {
+#if !defined(OS_MACOSX)
+// TODO: implement ShellLoginDialog for other platforms, drop this #if
+  return NULL;
+#else
+  return new ShellLoginDialog(auth_info, request);
+#endif
+}
+
+}  // namespace content
diff --git a/content/shell/shell_resource_dispatcher_host_delegate.h b/content/shell/shell_resource_dispatcher_host_delegate.h
new file mode 100644
index 0000000..ec537c5
--- /dev/null
+++ b/content/shell/shell_resource_dispatcher_host_delegate.h
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 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 CONTENT_SHELL_SHELL_RESOURCE_DISPATCHER_HOST_DELEGATE_H_
+#define CONTENT_SHELL_SHELL_RESOURCE_DISPATCHER_HOST_DELEGATE_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "content/public/browser/resource_dispatcher_host_delegate.h"
+
+namespace content {
+
+class ShellResourceDispatcherHostDelegate
+    : public content::ResourceDispatcherHostDelegate {
+ public:
+  ShellResourceDispatcherHostDelegate();
+  virtual ~ShellResourceDispatcherHostDelegate();
+
+  // ResourceDispatcherHostDelegate implementation.
+  virtual bool AcceptAuthRequest(net::URLRequest* request,
+                                 net::AuthChallengeInfo* auth_info) OVERRIDE;
+  virtual content::ResourceDispatcherHostLoginDelegate* CreateLoginDelegate(
+      net::AuthChallengeInfo* auth_info, net::URLRequest* request) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ShellResourceDispatcherHostDelegate);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_SHELL_RESOURCE_DISPATCHER_HOST_DELEGATE_H_