Normalize top controls offset to (0, 1), Chromium-side.

mojo/services/html_viewer/weblayertreeview_impl.h

 // Copyright 2014 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 MOJO_SERVICES_HTML_VIEWER_WEBLAYERTREEVIEW_IMPL_H_
 #define MOJO_SERVICES_HTML_VIEWER_WEBLAYERTREEVIEW_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 71 matching lines @@
   virtual void setVisible(bool visible);
   virtual void setPageScaleFactorAndLimits(float page_scale_factor,
                                            float minimum,
                                            float maximum);
   virtual void startPageScaleAnimation(const blink::WebPoint& destination,
                                        bool use_anchor,
                                        float new_page_scale,
                                        double duration_sec);
   virtual void heuristicsForGpuRasterizationUpdated(bool matches_heuristic) {}
   virtual void setTopControlsContentOffset(float offset) {}
+  virtual void setTopControlsShownRatio(float ratio) {}
   virtual void setNeedsAnimate();
   virtual bool commitRequested() const;
   virtual void didStopFlinging() {}
   virtual void compositeAndReadbackAsync(
       blink::WebCompositeAndReadbackAsyncCallback* callback) {}
   virtual void finishAllRendering();
   virtual void setDeferCommits(bool defer_commits) {}
   virtual void registerForAnimations(blink::WebLayer* layer);
   virtual void registerViewportLayers(
       const blink::WebLayer* overscrollElasticityLayer,
@@ skipping 25 matching lines @@
       main_thread_compositor_task_runner_;
   base::WeakPtr<WebLayerTreeViewImpl> main_thread_bound_weak_ptr_;
 
   base::WeakPtrFactory<WebLayerTreeViewImpl> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(WebLayerTreeViewImpl);
 };
 
 }  // namespace html_viewer
 
 #endif  // MOJO_SERVICES_HTML_VIEWER_WEBLAYERTREEVIEW_IMPL_H_