Fix folder icon animation in app list.

ui/gfx/transform_util.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_GFX_TRANSFORM_UTIL_H_
 #define UI_GFX_TRANSFORM_UTIL_H_
 
 #include "ui/gfx/gfx_export.h"
 #include "ui/gfx/transform.h"
 
 namespace gfx {
 
 class Point;
 class Rect;
 
 // Returns a scale transform at |anchor| point.
 GFX_EXPORT Transform GetScaleTransform(const Point& anchor, float scale);
 
+// Returns a translate and scale transform which transforms from one rect to

[Matt Giuca, 2014/11/04 01:05:17]

Drop the "translate and scale" --- that's an implementation detail. The key is
that it transforms one rect to another.

[calamity, 2014/11/04 01:40:29]

Done.

+// another.
+GFX_EXPORT Transform
+    GetRectTransform(const gfx::Rect& from, const gfx::Rect& to);
+
 // Contains the components of a factored transform. These components may be
 // blended and recomposed.
 struct GFX_EXPORT DecomposedTransform {
   // The default constructor initializes the components in such a way that
   // if used with Compose below, will produce the identity transform.
   DecomposedTransform();
 
   SkMScalar translate[3];
   SkMScalar scale[3];
   SkMScalar skew[3];
@@ skipping 25 matching lines @@
 // http://www.w3.org/TR/css3-3d-transforms/.
 GFX_EXPORT Transform ComposeTransform(const DecomposedTransform& decomp);
 
 GFX_EXPORT bool SnapTransform(Transform* out,
                               const Transform& transform,
                               const Rect& viewport);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_TRANSFORM_UTIL_H_