[WIP] ash/extensions: Add experimental extension support for window-management in ash.

ui/gfx/transform.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 "ui/gfx/transform.h"
 #include "ui/gfx/point3.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/skia_util.h"
 
 namespace {
@@ skipping 58 matching lines @@
 
 void Transform::SetTranslate(float x, float y) {
   matrix_.setTranslate(SkFloatToScalar(x),
                        SkFloatToScalar(y),
                        matrix_.get(2, 3));
 }
 
 void Transform::SetPerspectiveDepth(float depth) {
   SkMatrix44 m;
   m.set(3, 2, -1 / depth);
-  matrix_ = m;
+  matrix_.postConcat(m);
 }
 
 void Transform::ConcatRotate(float degree) {
   SkMatrix44 rot;
   rot.setRotateDegreesAbout(0, 0, 1, SkFloatToScalar(degree));
   matrix_.postConcat(rot);
 }
 
 void Transform::ConcatRotateAbout(const gfx::Point3f& axis, float degree) {
   SkMatrix44 rot;
@@ skipping 107 matching lines @@
     0,
     1 };
 
   xform.map(p);
 
   point.SetPoint(SymmetricRound(p[0]),
                  SymmetricRound(p[1]));
 }
 
 }  // namespace ui