Initial work on a new <view> element backed by a mojo::View.

sky/engine/core/loader/FrameLoaderClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 69 matching lines @@
 
         virtual void dispatchAddNavigationTransitionData(const String& origin, const String& selector, const String& markup) { }
         virtual void dispatchWillRequestResource(FetchRequest*) { }
 
         virtual void didStartLoading(LoadStartType) = 0;
         virtual void progressEstimateChanged(double progressEstimate) = 0;
         virtual void didStopLoading() = 0;
 
         virtual void loadURLExternally(const ResourceRequest&, NavigationPolicy, const String& suggestedName = String()) = 0;
 
+        // TODO(mpcomplete): return surface ID?
+        virtual void createView(const KURL&) = 0;
+
         // Transmits the change in the set of watched CSS selectors property
         // that match any element on the frame.
         virtual void selectorMatchChanged(const Vector<String>& addedSelectors, const Vector<String>& removedSelectors) = 0;
 
         virtual void transitionToCommittedForNewPage() = 0;
 
 
         virtual void documentElementAvailable() = 0;
 
         virtual void didCreateScriptContext(v8::Handle<v8::Context>, int extensionGroup, int worldId) = 0;
         virtual void willReleaseScriptContext(v8::Handle<v8::Context>, int worldId) = 0;
 
         virtual void didChangeScrollOffset() { }
         virtual void didRemoveAllPendingStylesheet() { }
 
         // Informs the embedder that a WebGL canvas inside this frame received a lost context
         // notification with the given GL_ARB_robustness guilt/innocence code (see Extensions3D.h).
         virtual void didLoseWebGLContext(int) { }
 
         virtual void dispatchDidChangeResourcePriority(unsigned long identifier, ResourceLoadPriority, int intraPriorityValue) { }
 
         virtual void dispatchDidChangeManifest() { }
 
         virtual bool isFrameLoaderClientImpl() const { return false; }
     };
 
 } // namespace blink
 
 #endif // FrameLoaderClient_h