Add two pixel-based compositor unittests.

ui/gfx/compositor/test_texture.cc

Index: ui/gfx/compositor/test_texture.cc
diff --git a/ui/gfx/compositor/test_texture.cc b/ui/gfx/compositor/test_texture.cc
deleted file mode 100644
index ce1b9f48a731b55207d808c09b494c117a93df83..0000000000000000000000000000000000000000
--- a/ui/gfx/compositor/test_texture.cc
+++ /dev/null
@@ -1,35 +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_texture.h"
-
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkDevice.h"
-
-namespace ui {
-
-// static
-int TestTexture::live_count_ = 0;
-
-TestTexture::TestTexture() {
-  live_count_++;
-}
-
-TestTexture::~TestTexture() {
-  live_count_--;
-}
-
-void TestTexture::SetCanvas(const SkCanvas& canvas,
-                            const gfx::Point& origin,
-                            const gfx::Size& overall_size) {
-  const SkBitmap& bitmap = canvas.getDevice()->accessBitmap(false);
-  bounds_of_last_paint_.SetRect(
-      origin.x(), origin.y(), bitmap.width(), bitmap.height());
-}
-
-void TestTexture::Draw(const ui::TextureDrawParams& params,
-                       const gfx::Rect& clip_bounds) {
-}
-
-}  // namespace ui