Remove the TestContextFactory, always use NullDraw GL for unit tests.

ui/compositor/test/test_context_factory.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 "ui/compositor/test/test_context_factory.h"
-
-#include "cc/output/output_surface.h"
-#include "cc/test/test_context_provider.h"
-#include "ui/compositor/reflector.h"
-
-namespace ui {
-
-TestContextFactory::TestContextFactory() {}
-
-TestContextFactory::~TestContextFactory() {}
-
-scoped_ptr<cc::OutputSurface> TestContextFactory::CreateOutputSurface(
-    Compositor* compositor, bool software_fallback) {
-  DCHECK(!software_fallback);
-  return make_scoped_ptr(
-      new cc::OutputSurface(cc::TestContextProvider::Create()));
-}
-
-scoped_refptr<Reflector> TestContextFactory::CreateReflector(
-    Compositor* mirrored_compositor,
-    Layer* mirroring_layer) {
-  return new Reflector();
-}
-
-void TestContextFactory::RemoveReflector(scoped_refptr<Reflector> reflector) {
-}
-
-scoped_refptr<cc::ContextProvider>
-TestContextFactory::OffscreenCompositorContextProvider() {
-  if (!offscreen_compositor_contexts_.get() ||
-      offscreen_compositor_contexts_->DestroyedOnMainThread())
-    offscreen_compositor_contexts_ = cc::TestContextProvider::Create();
-  return offscreen_compositor_contexts_;
-}
-
-scoped_refptr<cc::ContextProvider>
-TestContextFactory::SharedMainThreadContextProvider() {
-  if (shared_main_thread_contexts_ &&
-      !shared_main_thread_contexts_->DestroyedOnMainThread())
-    return shared_main_thread_contexts_;
-
-  if (ui::Compositor::WasInitializedWithThread()) {
-    shared_main_thread_contexts_ = cc::TestContextProvider::Create();
-  } else {
-    shared_main_thread_contexts_ =
-        static_cast<cc::TestContextProvider*>(
-            OffscreenCompositorContextProvider().get());
-  }
-  if (shared_main_thread_contexts_ &&
-      !shared_main_thread_contexts_->BindToCurrentThread())
-    shared_main_thread_contexts_ = NULL;
-
-  return shared_main_thread_contexts_;
-}
-
-void TestContextFactory::RemoveCompositor(Compositor* compositor) {
-}
-
-bool TestContextFactory::DoesCreateTestContexts() { return true; }
-
-}  // namespace ui