Move GetDocument method from WebFrame to WebLocalFrame.

third_party/WebKit/public/web/WebFrame.h

 /*
  * Copyright (C) 2009 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 32 matching lines @@
 #include "v8/include/v8.h"
 
 namespace blink {
 
 class Frame;
 class OpenedFrameTracker;
 class Page;
 class Visitor;
 class WebAssociatedURLLoader;
 struct WebAssociatedURLLoaderOptions;
-class WebDocument;
 class WebElement;
 class WebLocalFrame;
 class WebPerformance;
 class WebRemoteFrame;
 class WebSecurityOrigin;
 class WebString;
 class WebURL;
 class WebURLRequest;
 class WebView;
 enum class WebSandboxFlags;
@@ skipping 118 matching lines @@
   WebFrame* FirstChild() const;
 
   // Returns the next sibling frame.
   WebFrame* NextSibling() const;
 
   // Returns the next frame in "frame traversal order".
   WebFrame* TraverseNext() const;
 
   // Content ------------------------------------------------------------
 
-  virtual WebDocument GetDocument() const = 0;
-
   virtual WebPerformance Performance() const = 0;
 
   // Scripting ----------------------------------------------------------
 
   // Returns the global proxy object.
   virtual v8::Local<v8::Object> GlobalProxy() const = 0;
 
   // Returns true if the WebFrame currently executing JavaScript has access
   // to the given WebFrame, or false otherwise.
   static bool ScriptCanAccess(WebFrame*);
@@ skipping 88 matching lines @@
   WebFrame* first_child_;
   WebFrame* last_child_;
 
   WebFrame* opener_;
   std::unique_ptr<OpenedFrameTracker> opened_frame_tracker_;
 };
 
 }  // namespace blink
 
 #endif