Add two pixel-based compositor unittests.

ui/gfx/compositor/test_compositor.cc

Index: ui/gfx/compositor/test_compositor.cc
diff --git a/ui/gfx/compositor/test_compositor.cc b/ui/gfx/compositor/test_compositor.cc
deleted file mode 100644
index 54854861e113dade76abda561e14c293bd815f68..0000000000000000000000000000000000000000
--- a/ui/gfx/compositor/test_compositor.cc
+++ /dev/null
@@ -1,62 +0,0 @@
-// Copyright (c) 2011 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/compositor/test_compositor.h"
-
-#include "ui/gfx/compositor/test_texture.h"
-
-namespace ui {
-
-class TestCompositorDelegate : public ui::CompositorDelegate {
- public:
-  TestCompositorDelegate() {}
-  virtual ~TestCompositorDelegate() {}
-
-  virtual void ScheduleDraw() OVERRIDE {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestCompositorDelegate);
-};
-
-TestCompositor::TestCompositor(CompositorDelegate *owner)
-    : Compositor((owner ? owner : new TestCompositorDelegate),
-                 gfx::Size(100, 100)) {
-  if (!owner)
-    owned_delegate_.reset(static_cast<TestCompositorDelegate*>(delegate()));
-}
-
-TestCompositor::~TestCompositor() {
-}
-
-ui::Texture* TestCompositor::CreateTexture() {
-  return new TestTexture();
-}
-
-void TestCompositor::OnNotifyStart(bool clear) {
-}
-
-void TestCompositor::OnNotifyEnd() {
-}
-
-void TestCompositor::Blur(const gfx::Rect& bounds) {
-}
-
-void TestCompositor::DrawTree() {
-#if !defined(USE_WEBKIT_COMPOSITOR)
-  Compositor::DrawTree();
-#endif
-}
-
-bool TestCompositor::ReadPixels(SkBitmap* bitmap) {
-  return false;
-}
-
-ui::Compositor* TestCompositor::Create(ui::CompositorDelegate* owner) {
-  return new ui::TestCompositor(owner);
-}
-
-void TestCompositor::OnWidgetSizeChanged() {
-}
-
-}  // namespace ui