Make BrowserControls take and store a Page instead of a FrameHost

third_party/WebKit/Source/core/frame/BrowserControls.h

 // Copyright 2016 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 BrowserControls_h
 #define BrowserControls_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebBrowserControlsState.h"
 
 namespace blink {
-class FrameHost;
+class Page;
 class FloatSize;
 
 // This class encapsulate data and logic required to show/hide browser controls
 // duplicating cc::BrowserControlsManager behaviour.  Browser controls'
 // self-animation to completion is still handled by compositor and kicks in
 // when scrolling is complete (i.e, upon ScrollEnd or FlingEnd).
 class CORE_EXPORT BrowserControls final
     : public GarbageCollected<BrowserControls> {
  public:
-  static BrowserControls* create(const FrameHost& host) {
-    return new BrowserControls(host);
+  static BrowserControls* create(const Page& page) {
+    return new BrowserControls(page);
   }
 
   DECLARE_TRACE();
 
   // The amount that the viewport was shrunk by to accommodate the top
   // controls.
   float layoutHeight();
   // The amount that browser controls are currently shown.
   float contentOffset();
 
@@ skipping 10 matching lines @@
 
   void scrollBegin();
 
   // Scrolls browser controls vertically if possible and returns the remaining
   // scroll amount.
   FloatSize scrollBy(FloatSize scrollDelta);
 
   WebBrowserControlsState permittedState() const { return m_permittedState; }
 
  private:
-  explicit BrowserControls(const FrameHost&);
+  explicit BrowserControls(const Page&);
   void resetBaseline();
 
-  Member<const FrameHost> m_frameHost;
+  Member<const Page> m_page;
 
   // The browser controls height regardless of whether it is visible or not.
   float m_height;
 
   // The browser controls shown amount (normalized from 0 to 1) since the last
   // compositor commit. This value is updated from two sources:
   // (1) compositor (impl) thread at the beginning of frame if it has
   //     scrolled browser controls since last commit.
   // (2) blink (main) thread updates this value if it scrolls browser controls
   //     when responding to gesture scroll events.
@@ skipping 10 matching lines @@
   // If this is true, then the embedder shrunk the WebView size by the top
   // controls height.
   bool m_shrinkViewport;
 
   // Constraints on the browser controls state
   WebBrowserControlsState m_permittedState;
 };
 }  // namespace blink
 
 #endif  // BrowserControls_h