Credential Manager: Migrate to WebView client-based approach.

public/platform/Platform.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 48 matching lines @@
 
 namespace blink {
 
 class WebAudioBus;
 class WebBlobRegistry;
 class WebContentDecryptionModule;
 class WebClipboard;
 class WebCompositorSupport;
 class WebConvertableToTraceFormat;
 class WebCookieJar;
-class WebCredentialManager;
 class WebCrypto;
 class WebDatabaseObserver;
 class WebDiscardableMemory;
 class WebPlatformEventListener;
 class WebFallbackThemeEngine;
 class WebFileSystem;
 class WebFileUtilities;
 class WebFlingAnimator;
 class WebGestureCurveTarget;
 class WebGestureCurve;
@@ skipping 84 matching lines @@
     // Creates a platform dependent WebMIDIAccessor. MIDIAccessor under platform
     // creates and owns it.
     virtual WebMIDIAccessor* createMIDIAccessor(WebMIDIAccessorClient*) { return 0; }
 
 
     // Blob ----------------------------------------------------------------
 
     // Must return non-null.
     virtual WebBlobRegistry* blobRegistry() { return 0; }
 
-    // Credential Management -----------------------------------------------
-
-    virtual WebCredentialManager* credentialManager() { return 0; }
-
     // Database ------------------------------------------------------------
 
     // Opens a database file; dirHandle should be 0 if the caller does not need
     // a handle to the directory containing this file
     virtual FileHandle databaseOpenFile(const WebString& vfsFileName, int desiredFlags) { return FileHandle(); }
 
     // Deletes a database file and returns the error code
     virtual int databaseDeleteFile(const WebString& vfsFileName, bool syncDir) { return 0; }
 
     // Returns the attributes of the given database file
@@ skipping 448 matching lines @@
     virtual WebNotificationPresenter* notificationPresenter() { return 0; }
 
 
 protected:
     virtual ~Platform() { }
 };
 
 } // namespace blink
 
 #endif