Thread ui transform animations

ui/views/view.h

 // Copyright (c) 2012 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 UI_VIEWS_VIEW_H_
 #define UI_VIEWS_VIEW_H_
 
 #include <algorithm>
 #include <map>
 #include <set>
@@ skipping 248 matching lines @@
   // color. This doesn't affect compositing but is a hint to the compositor to
   // optimize painting.
   // Note that this method does not implicitly create a layer if one does not
   // already exist for the View, but is a no-op in that case.
   void SetFillsBoundsOpaquely(bool fills_bounds_opaquely);
 
   // Transformations -----------------------------------------------------------
 
   // Methods for setting transformations for a view (e.g. rotation, scaling).
 
-  const gfx::Transform& GetTransform() const;
+  gfx::Transform GetTransform() const;
 
   // Clipping parameters. Clipping is done relative to the view bounds.
   void set_clip_insets(gfx::Insets clip_insets) { clip_insets_ = clip_insets; }
 
   // Sets the transform to the supplied transform.
   void SetTransform(const gfx::Transform& transform);
 
   // Sets whether this view paints to a layer. A view paints to a layer if
   // either of the following are true:
   // . the view has a non-identity transform.
@@ skipping 1211 matching lines @@
   base::win::ScopedComPtr<NativeViewAccessibilityWin>
       native_view_accessibility_win_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEW_H_