Move MaxScrollOffset to property_trees

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 438 matching lines @@
   size_t 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;
+
+  // SetBoundsForTesting shall only be called by impl thread unit tests.
+  // It calls SetBounds and rebuild property trees.
+  void SetBoundsForTesting(const gfx::Size& bounds);

[sunxd, 2016/02/09 00:11:32]

This is dead code, will be deleted.

+
   // 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 SetCurrentScrollOffset(const gfx::ScrollOffset& scroll_offset);
   void PushScrollOffsetFromMainThread(const gfx::ScrollOffset& scroll_offset);
   // This method is similar to PushScrollOffsetFromMainThread but will cause the
   // scroll offset given to clobber any scroll changes on the active tree in the
@@ skipping 422 matching lines @@
   // If true, the layer or one of its descendants has a touch handler.
   bool layer_or_descendant_has_touch_handler_;
   bool sorted_for_recursion_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_