Credential Manager: Migrate to WebView client-based approach.

Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 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 124 matching lines @@
     virtual bool isAcceleratedCompositingActive() const OVERRIDE;
     virtual void willCloseLayerTreeView() OVERRIDE;
     virtual void didAcquirePointerLock() OVERRIDE;
     virtual void didNotAcquirePointerLock() OVERRIDE;
     virtual void didLosePointerLock() OVERRIDE;
     virtual void didChangeWindowResizerRect() OVERRIDE;
 
     // WebView methods:
     virtual void setMainFrame(WebFrame*) OVERRIDE;
     virtual void setAutofillClient(WebAutofillClient*) OVERRIDE;
+    virtual void setCredentialManagerClient(WebCredentialManagerClient*) OVERRIDE;
     virtual void setDevToolsAgentClient(WebDevToolsAgentClient*) OVERRIDE;
     virtual void setPrerendererClient(WebPrerendererClient*) OVERRIDE;
     virtual void setSpellCheckClient(WebSpellCheckClient*) OVERRIDE;
     virtual WebSettings* settings() OVERRIDE;
     virtual WebString pageEncoding() const OVERRIDE;
     virtual void setPageEncoding(const WebString&) OVERRIDE;
     virtual bool isTransparent() const OVERRIDE;
     virtual void setIsTransparent(bool value) OVERRIDE;
     virtual void setBaseBackgroundColor(WebColor) OVERRIDE;
     virtual bool tabsToLinks() const OVERRIDE;
@@ skipping 561 matching lines @@
     bool m_userGestureObserved;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 } // namespace blink
 
 #endif