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diff --git a/chromium/mojo/examples/compositor_app/compositor_host.cc b/chromium/mojo/examples/compositor_app/compositor_host.cc
new file mode 100644
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--- /dev/null
+++ b/chromium/mojo/examples/compositor_app/compositor_host.cc
@@ -0,0 +1,89 @@
+// 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 "mojo/examples/compositor_app/compositor_host.h"
+
+#include "cc/layers/layer.h"
+#include "cc/layers/solid_color_layer.h"
+#include "cc/output/context_provider.h"
+#include "cc/output/output_surface.h"
+#include "cc/trees/layer_tree_host.h"
+#include "mojo/cc/context_provider_mojo.h"
+
+namespace mojo {
+namespace examples {
+
+CompositorHost::CompositorHost(ScopedMessagePipeHandle command_buffer_handle)
+    : command_buffer_handle_(command_buffer_handle.Pass()),
+      compositor_thread_("compositor") {
+  DCHECK(command_buffer_handle_.is_valid());
+  bool started = compositor_thread_.Start();
+  DCHECK(started);
+
+  cc::LayerTreeSettings settings;
+  tree_ = cc::LayerTreeHost::CreateThreaded(
+      this, NULL, settings, compositor_thread_.message_loop_proxy());
+  SetupScene();
+}
+
+CompositorHost::~CompositorHost() {}
+
+void CompositorHost::SetSize(const gfx::Size& viewport_size) {
+  tree_->SetViewportSize(viewport_size);
+  tree_->SetLayerTreeHostClientReady();
+}
+
+void CompositorHost::SetupScene() {
+  scoped_refptr<cc::Layer> root_layer = cc::SolidColorLayer::Create();
+  root_layer->SetBounds(gfx::Size(500, 500));
+  root_layer->SetBackgroundColor(SK_ColorBLUE);
+  root_layer->SetIsDrawable(true);
+  tree_->SetRootLayer(root_layer);
+
+  child_layer_ = cc::SolidColorLayer::Create();
+  child_layer_->SetBounds(gfx::Size(100, 100));
+  child_layer_->SetBackgroundColor(SK_ColorGREEN);
+  child_layer_->SetIsDrawable(true);
+  gfx::Transform child_transform;
+  child_transform.Translate(200, 200);
+  child_layer_->SetTransform(child_transform);
+  root_layer->AddChild(child_layer_);
+}
+
+void CompositorHost::WillBeginMainFrame(int frame_id) {}
+void CompositorHost::DidBeginMainFrame() {}
+
+void CompositorHost::Animate(base::TimeTicks frame_begin_time) {
+  // TODO(jamesr): Should use cc's animation system.
+  static const double kDegreesPerSecond = 70.0;
+  double time_in_seconds = (frame_begin_time - base::TimeTicks()).InSecondsF();
+  double child_rotation_degrees = kDegreesPerSecond * time_in_seconds;
+  gfx::Transform child_transform;
+  child_transform.Translate(200, 200);
+  child_transform.Rotate(child_rotation_degrees);
+  child_layer_->SetTransform(child_transform);
+  tree_->SetNeedsAnimate();
+}
+
+void CompositorHost::Layout() {}
+void CompositorHost::ApplyScrollAndScale(const gfx::Vector2d& scroll_delta,
+                                         float page_scale) {}
+
+scoped_ptr<cc::OutputSurface> CompositorHost::CreateOutputSurface(
+    bool fallback) {
+  return make_scoped_ptr(
+      new cc::OutputSurface(
+          new ContextProviderMojo(command_buffer_handle_.Pass())));
+}
+
+void CompositorHost::DidInitializeOutputSurface() {
+}
+
+void CompositorHost::WillCommit() {}
+void CompositorHost::DidCommit() {}
+void CompositorHost::DidCommitAndDrawFrame() {}
+void CompositorHost::DidCompleteSwapBuffers() {}
+
+}  // namespace examples
+}  // namespace mojo