gfx::Transform API clean-up

ash/wm/workspace/workspace_animations.cc

 // 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.
 
 #include "ash/wm/workspace/workspace_animations.h"
 
 #include "ash/ash_switches.h"
 #include "base/command_line.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
@@ skipping 16 matching lines @@
 enum WorkspaceScaleType {
   WORKSPACE_SCALE_ABOVE,
   WORKSPACE_SCALE_BELOW,
 };
 
 // Applies the specified WorkspaceScaleType.
 void ApplyWorkspaceScale(ui::Layer* layer, WorkspaceScaleType type) {
   const float scale = type == WORKSPACE_SCALE_ABOVE ? kWorkspaceScaleAbove :
       kWorkspaceScaleBelow;
   gfx::Transform transform;
-  transform.ConcatScale(scale, scale);
-  transform.ConcatTranslate(
-      -layer->bounds().width() * (scale - 1.0f) / 2,
-      -layer->bounds().height() * (scale - 1.0f) / 2);
+  transform.Translate(-layer->bounds().width() * (scale - 1.0f) / 2,
+                      -layer->bounds().height() * (scale - 1.0f) / 2);
+  transform.Scale(scale, scale);
   layer->SetTransform(transform);
 }
 
 // If |details.duration| is not-empty it is returned, otherwise
 // |kWorkspaceSwitchTimeMS| is returned.
 base::TimeDelta DurationForWorkspaceShowOrHide(
     const WorkspaceAnimationDetails& details) {
   return details.duration == base::TimeDelta() ?
       base::TimeDelta::FromMilliseconds(kWorkspaceSwitchTimeMS) :
       details.duration;
@@ skipping 101 matching lines @@
   // After the animation completes snap the transform back to the identity,
   // otherwise any one that asks for screen bounds gets a slightly scaled
   // version.
   settings.SetPreemptionStrategy(ui::LayerAnimator::ENQUEUE_NEW_ANIMATION);
   settings.SetTransitionDuration(base::TimeDelta());
   window->layer()->SetTransform(gfx::Transform());
 }
 
 }  // namespace internal
 }  // namespace ash