Made top controls work with virtual viewport pinch-to-zoom. (Chromium)

cc/layers/layer_impl.h

 // Copyright 2011 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 CC_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <set>
 #include <string>
 
@@ skipping 347 matching lines @@
   int num_unclipped_descendants() const {
     return draw_properties_.num_unclipped_descendants;
   }
 
   // The client should be responsible for setting bounds, content bounds and
   // contents scale to appropriate values. LayerImpl doesn't calculate any of
   // them from the other values.
 
   void SetBounds(const gfx::Size& bounds);
   gfx::Size bounds() const;
+  // Like bounds() but doesn't snap to int. Lossy on giant pages (e.g. millions
+  // of pixels) due to use of single precision float.
+  gfx::SizeF BoundsForScrolling() const;
   void SetBoundsDelta(const gfx::Vector2dF& bounds_delta);
   gfx::Vector2dF bounds_delta() const { return bounds_delta_; }
 
   void SetContentBounds(const gfx::Size& content_bounds);
   gfx::Size content_bounds() const { return draw_properties_.content_bounds; }
 
   float contents_scale_x() const { return draw_properties_.contents_scale_x; }
   float contents_scale_y() const { return draw_properties_.contents_scale_y; }
   void SetContentsScale(float contents_scale_x, float contents_scale_y);
 
@@ skipping 329 matching lines @@
   DrawProperties<LayerImpl> draw_properties_;
 
   scoped_refptr<base::debug::ConvertableToTraceFormat> debug_info_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_