Introduce the abstract class WebViewBase, to decouple WebViewImpl.

third_party/WebKit/Source/web/FullscreenController.h

 /*
  * Copyright (C) 2013 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 23 matching lines @@
 #include <memory>
 
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/Color.h"
 
 namespace blink {
 
 class Element;
 class LocalFrame;
-class WebViewImpl;
+class WebViewBase;
 
 class FullscreenController {
  public:
-  static std::unique_ptr<FullscreenController> Create(WebViewImpl*);
+  static std::unique_ptr<FullscreenController> Create(WebViewBase*);
 
   // Called by Fullscreen (via ChromeClient) to request entering or exiting
   // fullscreen.
   void EnterFullscreen(LocalFrame&);
   void ExitFullscreen(LocalFrame&);
 
   // Called by content::RenderWidget (via WebWidget) to notify that we've
   // entered or exited fullscreen. This can be because we requested it, or it
   // can be initiated by the browser directly.
   void DidEnterFullscreen();
   void DidExitFullscreen();
 
   // Called by Fullscreen (via ChromeClient) to notify that the fullscreen
   // element has changed.
   void FullscreenElementChanged(Element*, Element*);
 
   bool IsFullscreenOrTransitioning() const { return state_ != State::kInitial; }
 
   void UpdateSize();
 
   void DidUpdateLayout();
 
  protected:
-  explicit FullscreenController(WebViewImpl*);
+  explicit FullscreenController(WebViewBase*);
 
  private:
   void UpdatePageScaleConstraints(bool remove_constraints);
   void RestoreBackgroundColorOverride();
 
-  WebViewImpl* web_view_impl_;
+  WebViewBase* web_view_base_;
 
   // State is used to avoid unnecessary enter/exit requests, and to restore the
   // m_initial* after the first layout upon exiting fullscreen. Typically, the
   // state goes through every state from Initial to NeedsScrollAndScaleRestore
   // and then back to Initial, but the are two exceptions:
   //  1. didExitFullscreen() can transition from any non-Initial state to
   //     NeedsScrollAndScaleRestore, in case of a browser-intiated exit.
   //  2. enterFullscreen() can transition from NeedsScrollAndScaleRestore to
   //     EnteringFullscreen, in case of a quick exit+enter.
   enum class State {
     kInitial,
     kEnteringFullscreen,
     kFullscreen,
     kExitingFullscreen,
     kNeedsScrollAndScaleRestore
   };
   State state_ = State::kInitial;
 
   float initial_page_scale_factor_ = 0.0f;
   IntSize initial_scroll_offset_;
   FloatPoint initial_visual_viewport_offset_;
   bool initial_background_color_override_enabled_ = false;
   RGBA32 initial_background_color_override_ = Color::kTransparent;
 };
 
 }  // namespace blink
 
 #endif