cc: Add readback and forced draw states to the Scheduler

cc/test/layer_tree_test.cc

 // Copyright 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 "cc/test/layer_tree_test.h"
 
 #include "base/command_line.h"
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_registrar.h"
 #include "cc/animation/layer_animation_controller.h"
@@ skipping 357 matching lines @@
                  base::Unretained(layer_to_receive_animation)));
 }
 
 void LayerTreeTest::PostSetNeedsCommitToMainThread() {
   proxy()->MainThreadTaskRunner()->PostTask(
       FROM_HERE,
       base::Bind(&LayerTreeTest::DispatchSetNeedsCommit,
                  main_thread_weak_ptr_));
 }
 
+void LayerTreeTest::PostReadbackToMainThread() {
+  proxy()->MainThreadTaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(&LayerTreeTest::DispatchReadback, main_thread_weak_ptr_));
+}
+
 void LayerTreeTest::PostAcquireLayerTextures() {
   proxy()->MainThreadTaskRunner()->PostTask(
       FROM_HERE,
       base::Bind(&LayerTreeTest::DispatchAcquireLayerTextures,
                  main_thread_weak_ptr_));
 }
 
 void LayerTreeTest::PostSetNeedsRedrawToMainThread() {
   proxy()->MainThreadTaskRunner()->PostTask(
       FROM_HERE,
@@ skipping 109 matching lines @@
   }
 }
 
 void LayerTreeTest::DispatchSetNeedsCommit() {
   DCHECK(!proxy() || proxy()->IsMainThread());
 
   if (layer_tree_host_)
     layer_tree_host_->SetNeedsCommit();
 }
 
+void LayerTreeTest::DispatchReadback() {
+  DCHECK(!proxy() || proxy()->IsMainThread());
+
+  if (layer_tree_host_) {
+    char pixels[4];
+    layer_tree_host()->CompositeAndReadback(&pixels, gfx::Rect(0, 0, 1, 1));
+  }
+}
+
 void LayerTreeTest::DispatchAcquireLayerTextures() {
   DCHECK(!proxy() || proxy()->IsMainThread());
 
   if (layer_tree_host_)
     layer_tree_host_->AcquireLayerTextures();
 }
 
 void LayerTreeTest::DispatchSetNeedsRedraw() {
   DCHECK(!proxy() || proxy()->IsMainThread());
 
@@ skipping 114 matching lines @@
 
 scoped_refptr<cc::ContextProvider> LayerTreeTest::
     OffscreenContextProviderForCompositorThread() {
   if (!compositor_thread_contexts_.get() ||
       compositor_thread_contexts_->DestroyedOnMainThread())
     compositor_thread_contexts_ = TestContextProvider::Create();
   return compositor_thread_contexts_;
 }
 
 }  // namespace cc