Move GetDocument method from WebFrame to WebLocalFrame.

content/renderer/savable_resources.h

 // Copyright (c) 2013 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_RENDERER_SAVABLE_RESOURCES_H_
 #define CONTENT_RENDERER_SAVABLE_RESOURCES_H_
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "content/common/content_export.h"
 #include "content/common/savable_subframe.h"
 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "url/gurl.h"
 
 namespace blink {
 class WebElement;
-class WebFrame;
+class WebLocalFrame;
 class WebString;
 }
 
 // A collection of operations that access the underlying WebKit DOM directly.
 namespace content {
 
 // Structure for storage the result of getting all savable resource links
 // for current page. The consumer of the SavableResourcesResult is responsible
 // for keeping these pointers valid for the lifetime of the
 // SavableResourcesResult instance.
 struct SavableResourcesResult {
   // Links of all savable resources.
   std::vector<GURL>* resources_list;
 
   // Subframes.
   std::vector<SavableSubframe>* subframes;
 
   // Constructor.
   SavableResourcesResult(
       std::vector<GURL>* resources_list,
       std::vector<SavableSubframe>* subframes)
       : resources_list(resources_list),
         subframes(subframes) {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SavableResourcesResult);
 };
 
-// Get all savable resource links from specified webframe.
+// Get all the savable resource links from the specified |frame|.
 // Returns true if the saved resources links have been saved successfully.
 // Otherwise returns false (i.e. if the frame contains a non-savable content).
 CONTENT_EXPORT bool GetSavableResourceLinksForFrame(
-    blink::WebFrame* frame,
+    blink::WebLocalFrame* frame,
     SavableResourcesResult* result);
 
 // Returns the value in an elements resource url attribute. For IMG, SCRIPT or
 // INPUT TYPE=image, returns the value in "src". For LINK TYPE=text/css, returns
 // the value in "href". For BODY, TABLE, TR, TD, returns the value in
 // "background". For BLOCKQUOTE, Q, DEL, INS, returns the value in "cite"
 // attribute. Otherwise returns a null WebString.
 CONTENT_EXPORT blink::WebString GetSubResourceLinkFromElement(
     const blink::WebElement& element);
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SAVABLE_RESOURCES_H_