Apply skew on both axes together rather than sequentially on Compositor thread

cc/animation/transform_operations.cc

 // Copyright 2013 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.
 
 #include "cc/animation/transform_operations.h"
 
 #include <algorithm>
 
 #include "ui/gfx/animation/tween.h"
 #include "ui/gfx/geometry/box_f.h"
@@ skipping 206 matching lines @@
   to_add.type = TransformOperation::TRANSFORM_OPERATION_SCALE;
   to_add.scale.x = x;
   to_add.scale.y = y;
   to_add.scale.z = z;
   operations_.push_back(to_add);
   decomposed_transform_dirty_ = true;
 }
 
 void TransformOperations::AppendSkew(SkMScalar x, SkMScalar y) {
   TransformOperation to_add;
-  to_add.matrix.SkewX(x);
-  to_add.matrix.SkewY(y);
+  to_add.matrix.Skew(x, y);
   to_add.type = TransformOperation::TRANSFORM_OPERATION_SKEW;
   to_add.skew.x = x;
   to_add.skew.y = y;
   operations_.push_back(to_add);
   decomposed_transform_dirty_ = true;
 }
 
 void TransformOperations::AppendPerspective(SkMScalar depth) {
   TransformOperation to_add;
   to_add.matrix.ApplyPerspectiveDepth(depth);
@@ skipping 68 matching lines @@
       decomposed_transform_.reset(new gfx::DecomposedTransform());
     gfx::Transform transform = Apply();
     if (!gfx::DecomposeTransform(decomposed_transform_.get(), transform))
       return false;
     decomposed_transform_dirty_ = false;
   }
   return true;
 }
 
 }  // namespace cc