Use Surfaces to hold delegated renderer contents.

content/browser/compositor/delegated_frame_layer_host.cc

 // Copyright 2014 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 "content/browser/compositor/delegated_frame_host.h"
+#include "content/browser/compositor/delegated_frame_layer_host.h"
 
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/resources/single_release_callback.h"
 #include "cc/resources/texture_mailbox.h"
+#include "cc/surfaces/surface_factory.h"
 #include "content/browser/compositor/resize_lock.h"
 #include "content/common/gpu/client/gl_helper.h"
 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
 #include "content/public/common/content_switches.h"
 #include "media/base/video_frame.h"
 #include "media/base/video_util.h"
 #include "skia/ext/image_operations.h"
 
 namespace content {
 
 ////////////////////////////////////////////////////////////////////////////////
-// DelegatedFrameHostClient
+// DelegatedFrameLayerHost
 
-bool DelegatedFrameHostClient::ShouldCreateResizeLock() {
-  // On Windows and Linux, holding pointer moves will not help throttling
-  // resizes.
-  // TODO(piman): on Windows we need to block (nested message loop?) the
-  // WM_SIZE event. On Linux we need to throttle at the WM level using
-  // _NET_WM_SYNC_REQUEST.
-  // TODO(ccameron): Mac browser window resizing is incompletely implemented.
-#if !defined(OS_CHROMEOS)
-  return false;
-#else
-  return GetDelegatedFrameHost()->ShouldCreateResizeLock();
-#endif
-}
-
-void DelegatedFrameHostClient::RequestCopyOfOutput(
-    scoped_ptr<cc::CopyOutputRequest> request) {
-  GetDelegatedFrameHost()->RequestCopyOfOutput(request.Pass());
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// DelegatedFrameHost
-
-DelegatedFrameHost::DelegatedFrameHost(DelegatedFrameHostClient* client)
+DelegatedFrameLayerHost::DelegatedFrameLayerHost(
+    DelegatedFrameHostClient* client)
     : client_(client),
       last_output_surface_id_(0),
       pending_delegated_ack_count_(0),
       skipped_frames_(false),
       can_lock_compositor_(YES_CAN_LOCK),
       delegated_frame_evictor_(new DelegatedFrameEvictor(this)) {
   ImageTransportFactory::GetInstance()->AddObserver(this);
 }
 
-void DelegatedFrameHost::WasShown() {
+void DelegatedFrameLayerHost::WasShown() {
   delegated_frame_evictor_->SetVisible(true);
 
   if (!released_front_lock_.get()) {
     ui::Compositor* compositor = client_->GetCompositor();
     if (compositor)
       released_front_lock_ = compositor->GetCompositorLock();
   }
 }
 
-void DelegatedFrameHost::WasHidden() {
+void DelegatedFrameLayerHost::WasHidden() {
   delegated_frame_evictor_->SetVisible(false);
   released_front_lock_ = NULL;
 }
 
-void DelegatedFrameHost::MaybeCreateResizeLock() {
+void DelegatedFrameLayerHost::MaybeCreateResizeLock() {
   if (!client_->ShouldCreateResizeLock())
     return;
   DCHECK(client_->GetCompositor());
 
   // Listen to changes in the compositor lock state.
   ui::Compositor* compositor = client_->GetCompositor();
   if (!compositor->HasObserver(this))
     compositor->AddObserver(this);
 
   bool defer_compositor_lock =
       can_lock_compositor_ == NO_PENDING_RENDERER_FRAME ||
       can_lock_compositor_ == NO_PENDING_COMMIT;
 
   if (can_lock_compositor_ == YES_CAN_LOCK)
     can_lock_compositor_ = YES_DID_LOCK;
 
   resize_lock_ = client_->CreateResizeLock(defer_compositor_lock);
 }
 
-bool DelegatedFrameHost::ShouldCreateResizeLock() {
+bool DelegatedFrameLayerHost::ShouldCreateResizeLock() {
   RenderWidgetHostImpl* host = client_->GetHost();
 
   if (resize_lock_)
     return false;
 
   if (host->should_auto_resize())
     return false;
 
   gfx::Size desired_size = client_->DesiredFrameSize();
   if (desired_size == current_frame_size_in_dip_ || desired_size.IsEmpty())
     return false;
 
   ui::Compositor* compositor = client_->GetCompositor();
   if (!compositor)
     return false;
 
   return true;
 }
 
-void DelegatedFrameHost::RequestCopyOfOutput(
+void DelegatedFrameLayerHost::RequestCopyOfOutput(
     scoped_ptr<cc::CopyOutputRequest> request) {
   client_->GetLayer()->RequestCopyOfOutput(request.Pass());
 }
 
-void DelegatedFrameHost::CopyFromCompositingSurface(
+void DelegatedFrameLayerHost::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
     const SkColorType color_type) {
   // Only ARGB888 and RGB565 supported as of now.
   bool format_support = ((color_type == kRGB_565_SkColorType) ||
                          (color_type == kN32_SkColorType));
   DCHECK(format_support);
   if (!CanCopyToBitmap()) {
     callback.Run(false, SkBitmap());
     return;
   }
 
   const gfx::Size& dst_size_in_pixel =
       client_->ConvertViewSizeToPixel(dst_size);
   scoped_ptr<cc::CopyOutputRequest> request =
       cc::CopyOutputRequest::CreateRequest(base::Bind(
-          &DelegatedFrameHost::CopyFromCompositingSurfaceHasResult,
+          &DelegatedFrameLayerHost::CopyFromCompositingSurfaceHasResult,
           dst_size_in_pixel,
           color_type,
           callback));
   gfx::Rect src_subrect_in_pixel =
       ConvertRectToPixel(client_->CurrentDeviceScaleFactor(), src_subrect);
   request->set_area(src_subrect_in_pixel);
   client_->RequestCopyOfOutput(request.Pass());
 }
 
-void DelegatedFrameHost::CopyFromCompositingSurfaceToVideoFrame(
-      const gfx::Rect& src_subrect,
-      const scoped_refptr<media::VideoFrame>& target,
-      const base::Callback<void(bool)>& callback) {
+void DelegatedFrameLayerHost::CopyFromCompositingSurfaceToVideoFrame(
+    const gfx::Rect& src_subrect,
+    const scoped_refptr<media::VideoFrame>& target,
+    const base::Callback<void(bool)>& callback) {
   if (!CanCopyToVideoFrame()) {
     callback.Run(false);
     return;
   }
 
   // Try get a texture to reuse.
   scoped_refptr<OwnedMailbox> subscriber_texture;
   if (frame_subscriber_) {
     if (!idle_frame_subscriber_textures_.empty()) {
       subscriber_texture = idle_frame_subscriber_textures_.back();
       idle_frame_subscriber_textures_.pop_back();
     } else if (GLHelper* helper =
                    ImageTransportFactory::GetInstance()->GetGLHelper()) {
       subscriber_texture = new OwnedMailbox(helper);
     }
   }
 
   scoped_ptr<cc::CopyOutputRequest> request =
       cc::CopyOutputRequest::CreateRequest(base::Bind(
-          &DelegatedFrameHost::
-               CopyFromCompositingSurfaceHasResultForVideo,
+          &DelegatedFrameLayerHost::CopyFromCompositingSurfaceHasResultForVideo,
           AsWeakPtr(),  // For caching the ReadbackYUVInterface on this class.
           subscriber_texture,
           target,
           callback));
   gfx::Rect src_subrect_in_pixel =
       ConvertRectToPixel(client_->CurrentDeviceScaleFactor(), src_subrect);
   request->set_area(src_subrect_in_pixel);
   if (subscriber_texture.get()) {
     request->SetTextureMailbox(
         cc::TextureMailbox(subscriber_texture->mailbox(),
                            subscriber_texture->target(),
                            subscriber_texture->sync_point()));
   }
   client_->RequestCopyOfOutput(request.Pass());
 }
 
-bool DelegatedFrameHost::CanCopyToBitmap() const {
+bool DelegatedFrameLayerHost::CanCopyToBitmap() const {
   return client_->GetCompositor() &&
          client_->GetLayer()->has_external_content();
 }
 
-bool DelegatedFrameHost::CanCopyToVideoFrame() const {
+bool DelegatedFrameLayerHost::CanCopyToVideoFrame() const {
   return client_->GetCompositor() &&
          client_->GetLayer()->has_external_content();
 }
 
-bool DelegatedFrameHost::CanSubscribeFrame() const {
+bool DelegatedFrameLayerHost::CanSubscribeFrame() const {
   return true;
 }
 
-void DelegatedFrameHost::BeginFrameSubscription(
+void DelegatedFrameLayerHost::BeginFrameSubscription(
     scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) {
   frame_subscriber_ = subscriber.Pass();
 }
 
-void DelegatedFrameHost::EndFrameSubscription() {
+void DelegatedFrameLayerHost::EndFrameSubscription() {
   idle_frame_subscriber_textures_.clear();
   frame_subscriber_.reset();
 }
 
-bool DelegatedFrameHost::ShouldSkipFrame(gfx::Size size_in_dip) const {
+bool DelegatedFrameLayerHost::HasFrameSubscriber() const {
+  return frame_subscriber_;
+}
+
+bool DelegatedFrameLayerHost::ShouldSkipFrame(gfx::Size size_in_dip) const {
   // Should skip a frame only when another frame from the renderer is guaranteed
   // to replace it. Otherwise may cause hangs when the renderer is waiting for
   // the completion of latency infos (such as when taking a Snapshot.)
   if (can_lock_compositor_ == NO_PENDING_RENDERER_FRAME ||
-      can_lock_compositor_ == NO_PENDING_COMMIT ||
-      !resize_lock_.get())
+      can_lock_compositor_ == NO_PENDING_COMMIT || !resize_lock_.get())
     return false;
 
   return size_in_dip != resize_lock_->expected_size();
 }
 
-void DelegatedFrameHost::WasResized() {
+void DelegatedFrameLayerHost::WasResized() {
   MaybeCreateResizeLock();
 }
 
-gfx::Size DelegatedFrameHost::GetRequestedRendererSize() const {
+gfx::Size DelegatedFrameLayerHost::GetRequestedRendererSize() const {
   if (resize_lock_)
     return resize_lock_->expected_size();
   else
     return client_->DesiredFrameSize();
 }
 
-void DelegatedFrameHost::CheckResizeLock() {
+void DelegatedFrameLayerHost::CheckResizeLock() {
   if (!resize_lock_ ||
       resize_lock_->expected_size() != current_frame_size_in_dip_)
     return;
 
   // Since we got the size we were looking for, unlock the compositor. But delay
   // the release of the lock until we've kicked a frame with the new texture, to
   // avoid resizing the UI before we have a chance to draw a "good" frame.
   resize_lock_->UnlockCompositor();
   ui::Compositor* compositor = client_->GetCompositor();
   if (compositor) {
     if (!compositor->HasObserver(this))
       compositor->AddObserver(this);
   }
 }
 
-void DelegatedFrameHost::DidReceiveFrameFromRenderer() {
+void DelegatedFrameLayerHost::DidReceiveFrameFromRenderer() {
   if (frame_subscriber() && CanCopyToVideoFrame()) {
     const base::TimeTicks present_time = base::TimeTicks::Now();
     scoped_refptr<media::VideoFrame> frame;
     RenderWidgetHostViewFrameSubscriber::DeliverFrameCallback callback;
-    if (frame_subscriber()->ShouldCaptureFrame(present_time,
-                                               &frame, &callback)) {
+    if (frame_subscriber()->ShouldCaptureFrame(
+            present_time, &frame, &callback)) {
       CopyFromCompositingSurfaceToVideoFrame(
           gfx::Rect(current_frame_size_in_dip_),
           frame,
           base::Bind(callback, present_time));
     }
   }
 }
 
-void DelegatedFrameHost::SwapDelegatedFrame(
+void DelegatedFrameLayerHost::SwapDelegatedFrame(
     uint32 output_surface_id,
     scoped_ptr<cc::DelegatedFrameData> frame_data,
     float frame_device_scale_factor,
     const std::vector<ui::LatencyInfo>& latency_info) {
   RenderWidgetHostImpl* host = client_->GetHost();
   DCHECK(!frame_data->render_pass_list.empty());
 
   cc::RenderPass* root_pass = frame_data->render_pass_list.back();
 
   gfx::Size frame_size = root_pass->output_rect.size();
   gfx::Size frame_size_in_dip =
       ConvertSizeToDIP(frame_device_scale_factor, frame_size);
 
   gfx::Rect damage_rect = gfx::ToEnclosingRect(root_pass->damage_rect);
   damage_rect.Intersect(gfx::Rect(frame_size));
   gfx::Rect damage_rect_in_dip =
       ConvertRectToDIP(frame_device_scale_factor, damage_rect);
 
   if (ShouldSkipFrame(frame_size_in_dip)) {
     cc::CompositorFrameAck ack;
     cc::TransferableResource::ReturnResources(frame_data->resource_list,
                                               &ack.resources);
 
     skipped_latency_info_list_.insert(skipped_latency_info_list_.end(),
-        latency_info.begin(), latency_info.end());
+                                      latency_info.begin(),
+                                      latency_info.end());
 
     RenderWidgetHostImpl::SendSwapCompositorFrameAck(
-        host->GetRoutingID(), output_surface_id,
-        host->GetProcess()->GetID(), ack);
+        host->GetRoutingID(),
+        output_surface_id,
+        host->GetProcess()->GetID(),
+        ack);
     skipped_frames_ = true;
     return;
   }
 
   if (skipped_frames_) {
     skipped_frames_ = false;
     damage_rect = gfx::Rect(frame_size);
     damage_rect_in_dip = gfx::Rect(frame_size_in_dip);
 
     // Give the same damage rect to the compositor.
@@ skipping 56 matching lines @@
 
   ui::Compositor* compositor = client_->GetCompositor();
   if (!compositor) {
     SendDelegatedFrameAck(output_surface_id);
   } else {
     std::vector<ui::LatencyInfo>::const_iterator it;
     for (it = latency_info.begin(); it != latency_info.end(); ++it)
       compositor->SetLatencyInfo(*it);
     // If we've previously skipped any latency infos add them.
     for (it = skipped_latency_info_list_.begin();
-        it != skipped_latency_info_list_.end();
-        ++it)
+         it != skipped_latency_info_list_.end();
+         ++it)
       compositor->SetLatencyInfo(*it);
     skipped_latency_info_list_.clear();
     AddOnCommitCallbackAndDisableLocks(
-        base::Bind(&DelegatedFrameHost::SendDelegatedFrameAck,
+        base::Bind(&DelegatedFrameLayerHost::SendDelegatedFrameAck,
                    AsWeakPtr(),
                    output_surface_id));
   }
   DidReceiveFrameFromRenderer();
   if (frame_provider_.get())
     delegated_frame_evictor_->SwappedFrame(!host->is_hidden());
   // Note: the frame may have been evicted immediately.
 }
 
-void DelegatedFrameHost::SendDelegatedFrameAck(uint32 output_surface_id) {
+void DelegatedFrameLayerHost::SetLayerOwner(ui::LayerOwner* layer_owner) {
+  layer_owner->set_layer_owner_delegate(this);
+}
+
+cc::DelegatedFrameProvider* DelegatedFrameLayerHost::FrameProviderForTesting()
+    const {
+  return frame_provider_.get();
+}
+
+void DelegatedFrameLayerHost::OnCompositingDidCommitForTesting(
+    ui::Compositor* compositor) {
+  OnCompositingDidCommit(compositor);
+}
+
+void DelegatedFrameLayerHost::SendDelegatedFrameAck(uint32 output_surface_id) {
   RenderWidgetHostImpl* host = client_->GetHost();
   cc::CompositorFrameAck ack;
   if (resource_collection_)
     resource_collection_->TakeUnusedResourcesForChildCompositor(&ack.resources);
   RenderWidgetHostImpl::SendSwapCompositorFrameAck(host->GetRoutingID(),
                                                    output_surface_id,
                                                    host->GetProcess()->GetID(),
                                                    ack);
   DCHECK_GT(pending_delegated_ack_count_, 0);
   pending_delegated_ack_count_--;
 }
 
-void DelegatedFrameHost::UnusedResourcesAreAvailable() {
+void DelegatedFrameLayerHost::UnusedResourcesAreAvailable() {
   if (pending_delegated_ack_count_)
     return;
 
   SendReturnedDelegatedResources(last_output_surface_id_);
 }
 
-void DelegatedFrameHost::SendReturnedDelegatedResources(
+void DelegatedFrameLayerHost::SendReturnedDelegatedResources(
     uint32 output_surface_id) {
   RenderWidgetHostImpl* host = client_->GetHost();
   DCHECK(resource_collection_);
 
   cc::CompositorFrameAck ack;
   resource_collection_->TakeUnusedResourcesForChildCompositor(&ack.resources);
   DCHECK(!ack.resources.empty());
 
   RenderWidgetHostImpl::SendReclaimCompositorResources(
       host->GetRoutingID(),
       output_surface_id,
       host->GetProcess()->GetID(),
       ack);
 }
 
-void DelegatedFrameHost::EvictDelegatedFrame() {
+void DelegatedFrameLayerHost::EvictDelegatedFrame() {
   client_->GetLayer()->SetShowPaintedContent();
   frame_provider_ = NULL;
   delegated_frame_evictor_->DiscardedFrame();
 }
 
 // static
-void DelegatedFrameHost::CopyFromCompositingSurfaceHasResult(
+void DelegatedFrameLayerHost::CopyFromCompositingSurfaceHasResult(
     const gfx::Size& dst_size_in_pixel,
     const SkColorType color_type,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
     scoped_ptr<cc::CopyOutputResult> result) {
   if (result->IsEmpty() || result->size().IsEmpty()) {
     callback.Run(false, SkBitmap());
     return;
   }
 
   if (result->HasTexture()) {
-    PrepareTextureCopyOutputResult(dst_size_in_pixel, color_type,
-                                   callback,
-                                   result.Pass());
+    PrepareTextureCopyOutputResult(
+        dst_size_in_pixel, color_type, callback, result.Pass());
     return;
   }
 
   DCHECK(result->HasBitmap());
-  PrepareBitmapCopyOutputResult(dst_size_in_pixel, color_type, callback,
-                                result.Pass());
+  PrepareBitmapCopyOutputResult(
+      dst_size_in_pixel, color_type, callback, result.Pass());
 }
 
 static void CopyFromCompositingSurfaceFinished(
     const base::Callback<void(bool, const SkBitmap&)>& callback,
     scoped_ptr<cc::SingleReleaseCallback> release_callback,
     scoped_ptr<SkBitmap> bitmap,
     scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock,
     bool result) {
   bitmap_pixels_lock.reset();
 
   uint32 sync_point = 0;
   if (result) {
     GLHelper* gl_helper = ImageTransportFactory::GetInstance()->GetGLHelper();
     sync_point = gl_helper->InsertSyncPoint();
   }
   bool lost_resource = sync_point == 0;
   release_callback->Run(sync_point, lost_resource);
 
   callback.Run(result, *bitmap);
 }
 
 // static
-void DelegatedFrameHost::PrepareTextureCopyOutputResult(
+void DelegatedFrameLayerHost::PrepareTextureCopyOutputResult(
     const gfx::Size& dst_size_in_pixel,
     const SkColorType color_type,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
     scoped_ptr<cc::CopyOutputResult> result) {
   DCHECK(result->HasTexture());
   base::ScopedClosureRunner scoped_callback_runner(
       base::Bind(callback, false, SkBitmap()));
 
   scoped_ptr<SkBitmap> bitmap(new SkBitmap);
   if (!bitmap->allocPixels(SkImageInfo::Make(dst_size_in_pixel.width(),
@@ skipping 28 matching lines @@
       color_type,
       base::Bind(&CopyFromCompositingSurfaceFinished,
                  callback,
                  base::Passed(&release_callback),
                  base::Passed(&bitmap),
                  base::Passed(&bitmap_pixels_lock)),
       GLHelper::SCALER_QUALITY_FAST);
 }
 
 // static
-void DelegatedFrameHost::PrepareBitmapCopyOutputResult(
+void DelegatedFrameLayerHost::PrepareBitmapCopyOutputResult(
     const gfx::Size& dst_size_in_pixel,
     const SkColorType color_type,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
     scoped_ptr<cc::CopyOutputResult> result) {
   if (color_type != kN32_SkColorType) {
     NOTIMPLEMENTED();
     callback.Run(false, SkBitmap());
     return;
   }
   DCHECK(result->HasBitmap());
   scoped_ptr<SkBitmap> source = result->TakeBitmap();
   DCHECK(source);
-  SkBitmap bitmap = skia::ImageOperations::Resize(
-      *source,
-      skia::ImageOperations::RESIZE_BEST,
-      dst_size_in_pixel.width(),
-      dst_size_in_pixel.height());
+  SkBitmap bitmap =
+      skia::ImageOperations::Resize(*source,
+                                    skia::ImageOperations::RESIZE_BEST,
+                                    dst_size_in_pixel.width(),
+                                    dst_size_in_pixel.height());
   callback.Run(true, bitmap);
 }
 
 // static
-void DelegatedFrameHost::ReturnSubscriberTexture(
-    base::WeakPtr<DelegatedFrameHost> dfh,
+void DelegatedFrameLayerHost::ReturnSubscriberTexture(
+    base::WeakPtr<DelegatedFrameLayerHost> dfh,
     scoped_refptr<OwnedMailbox> subscriber_texture,
     uint32 sync_point) {
   if (!subscriber_texture.get())
     return;
   if (!dfh)
     return;
 
   subscriber_texture->UpdateSyncPoint(sync_point);
 
   if (dfh->frame_subscriber_ && subscriber_texture->texture_id())
     dfh->idle_frame_subscriber_textures_.push_back(subscriber_texture);
 }
 
-void DelegatedFrameHost::CopyFromCompositingSurfaceFinishedForVideo(
-    base::WeakPtr<DelegatedFrameHost> dfh,
+void DelegatedFrameLayerHost::CopyFromCompositingSurfaceFinishedForVideo(
+    base::WeakPtr<DelegatedFrameLayerHost> dfh,
     const base::Callback<void(bool)>& callback,
     scoped_refptr<OwnedMailbox> subscriber_texture,
     scoped_ptr<cc::SingleReleaseCallback> release_callback,
     bool result) {
   callback.Run(result);
 
   uint32 sync_point = 0;
   if (result) {
     GLHelper* gl_helper = ImageTransportFactory::GetInstance()->GetGLHelper();
     sync_point = gl_helper->InsertSyncPoint();
   }
   if (release_callback) {
     // A release callback means the texture came from the compositor, so there
     // should be no |subscriber_texture|.
     DCHECK(!subscriber_texture);
     bool lost_resource = sync_point == 0;
     release_callback->Run(sync_point, lost_resource);
   }
   ReturnSubscriberTexture(dfh, subscriber_texture, sync_point);
 }
 
 // static
-void DelegatedFrameHost::CopyFromCompositingSurfaceHasResultForVideo(
-    base::WeakPtr<DelegatedFrameHost> dfh,
+void DelegatedFrameLayerHost::CopyFromCompositingSurfaceHasResultForVideo(
+    base::WeakPtr<DelegatedFrameLayerHost> dfh,
     scoped_refptr<OwnedMailbox> subscriber_texture,
     scoped_refptr<media::VideoFrame> video_frame,
     const base::Callback<void(bool)>& callback,
     scoped_ptr<cc::CopyOutputResult> result) {
   base::ScopedClosureRunner scoped_callback_runner(base::Bind(callback, false));
   base::ScopedClosureRunner scoped_return_subscriber_texture(
       base::Bind(&ReturnSubscriberTexture, dfh, subscriber_texture, 0));
 
   if (!dfh)
     return;
   if (result->IsEmpty())
     return;
   if (result->size().IsEmpty())
     return;
 
   // Compute the dest size we want after the letterboxing resize. Make the
   // coordinates and sizes even because we letterbox in YUV space
   // (see CopyRGBToVideoFrame). They need to be even for the UV samples to
   // line up correctly.
   // The video frame's coded_size() and the result's size() are both physical
   // pixels.
-  gfx::Rect region_in_frame =
-      media::ComputeLetterboxRegion(gfx::Rect(video_frame->coded_size()),
-                                    result->size());
+  gfx::Rect region_in_frame = media::ComputeLetterboxRegion(
+      gfx::Rect(video_frame->coded_size()), result->size());
   region_in_frame = gfx::Rect(region_in_frame.x() & ~1,
                               region_in_frame.y() & ~1,
                               region_in_frame.width() & ~1,
                               region_in_frame.height() & ~1);
   if (region_in_frame.IsEmpty())
     return;
 
   if (!result->HasTexture()) {
     DCHECK(result->HasBitmap());
     scoped_ptr<SkBitmap> bitmap = result->TakeBitmap();
     // Scale the bitmap to the required size, if necessary.
     SkBitmap scaled_bitmap;
     if (result->size().width() != region_in_frame.width() ||
         result->size().height() != region_in_frame.height()) {
       skia::ImageOperations::ResizeMethod method =
           skia::ImageOperations::RESIZE_GOOD;
-      scaled_bitmap = skia::ImageOperations::Resize(*bitmap.get(), method,
+      scaled_bitmap = skia::ImageOperations::Resize(*bitmap.get(),
+                                                    method,
                                                     region_in_frame.width(),
                                                     region_in_frame.height());
     } else {
       scaled_bitmap = *bitmap.get();
     }
 
     {
       SkAutoLockPixels scaled_bitmap_locker(scaled_bitmap);
 
       media::CopyRGBToVideoFrame(
@@ skipping 50 matching lines @@
                                              video_frame->coded_size(),
                                              region_in_frame,
                                              true,
                                              true));
     yuv_readback_pipeline = dfh->yuv_readback_pipeline_.get();
   }
 
   ignore_result(scoped_callback_runner.Release());
   ignore_result(scoped_return_subscriber_texture.Release());
   base::Callback<void(bool result)> finished_callback = base::Bind(
-      &DelegatedFrameHost::CopyFromCompositingSurfaceFinishedForVideo,
+      &DelegatedFrameLayerHost::CopyFromCompositingSurfaceFinishedForVideo,
       dfh->AsWeakPtr(),
       callback,
       subscriber_texture,
       base::Passed(&release_callback));
   yuv_readback_pipeline->ReadbackYUV(texture_mailbox.mailbox(),
                                      texture_mailbox.sync_point(),
                                      video_frame.get(),
                                      finished_callback);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// DelegatedFrameHost, ui::CompositorObserver implementation:
+// DelegatedFrameLayerHost, ui::CompositorObserver implementation:
 
-void DelegatedFrameHost::OnCompositingDidCommit(
+void DelegatedFrameLayerHost::OnCompositingDidCommit(
     ui::Compositor* compositor) {
   RenderWidgetHostImpl* host = client_->GetHost();
   if (can_lock_compositor_ == NO_PENDING_COMMIT) {
     can_lock_compositor_ = YES_CAN_LOCK;
     if (resize_lock_.get() && resize_lock_->GrabDeferredLock())
       can_lock_compositor_ = YES_DID_LOCK;
   }
   RunOnCommitCallbacks();
   if (resize_lock_ &&
       resize_lock_->expected_size() == current_frame_size_in_dip_) {
     resize_lock_.reset();
     host->WasResized();
     // We may have had a resize while we had the lock (e.g. if the lock expired,
     // or if the UI still gave us some resizes), so make sure we grab a new lock
     // if necessary.
     MaybeCreateResizeLock();
   }
 }
 
-void DelegatedFrameHost::OnCompositingStarted(
-    ui::Compositor* compositor, base::TimeTicks start_time) {
+void DelegatedFrameLayerHost::OnCompositingStarted(ui::Compositor* compositor,
+                                                   base::TimeTicks start_time) {
   last_draw_ended_ = start_time;
 }
 
-void DelegatedFrameHost::OnCompositingEnded(
-    ui::Compositor* compositor) {
+void DelegatedFrameLayerHost::OnCompositingEnded(ui::Compositor* compositor) {
 }
 
-void DelegatedFrameHost::OnCompositingAborted(ui::Compositor* compositor) {
+void DelegatedFrameLayerHost::OnCompositingAborted(ui::Compositor* compositor) {
 }
 
-void DelegatedFrameHost::OnCompositingLockStateChanged(
+void DelegatedFrameLayerHost::OnCompositingLockStateChanged(
     ui::Compositor* compositor) {
   // A compositor lock that is part of a resize lock timed out. We
   // should display a renderer frame.
   if (!compositor->IsLocked() && can_lock_compositor_ == YES_DID_LOCK) {
     can_lock_compositor_ = NO_PENDING_RENDERER_FRAME;
   }
 }
 
-void DelegatedFrameHost::OnUpdateVSyncParameters(
+void DelegatedFrameLayerHost::OnUpdateVSyncParameters(
     base::TimeTicks timebase,
     base::TimeDelta interval) {
   RenderWidgetHostImpl* host = client_->GetHost();
   if (client_->IsVisible())
     host->UpdateVSyncParameters(timebase, interval);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, ImageTransportFactoryObserver implementation:
 
-void DelegatedFrameHost::OnLostResources() {
+void DelegatedFrameLayerHost::OnLostResources() {
   RenderWidgetHostImpl* host = client_->GetHost();
   if (frame_provider_.get())
     EvictDelegatedFrame();
   idle_frame_subscriber_textures_.clear();
   yuv_readback_pipeline_.reset();
 
   host->ScheduleComposite();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// DelegatedFrameHost, private:
+// DelegatedFrameLayerHost, private:
 
-DelegatedFrameHost::~DelegatedFrameHost() {
+DelegatedFrameLayerHost::~DelegatedFrameLayerHost() {
   ImageTransportFactory::GetInstance()->RemoveObserver(this);
 
   if (resource_collection_.get())
     resource_collection_->SetClient(NULL);
 
   DCHECK(!vsync_manager_);
 }
 
-void DelegatedFrameHost::RunOnCommitCallbacks() {
-  for (std::vector<base::Closure>::const_iterator
-      it = on_compositing_did_commit_callbacks_.begin();
-      it != on_compositing_did_commit_callbacks_.end(); ++it) {
+void DelegatedFrameLayerHost::RunOnCommitCallbacks() {
+  for (std::vector<base::Closure>::const_iterator it =
+           on_compositing_did_commit_callbacks_.begin();
+       it != on_compositing_did_commit_callbacks_.end();
+       ++it) {
     it->Run();
   }
   on_compositing_did_commit_callbacks_.clear();
 }
 
-void DelegatedFrameHost::AddOnCommitCallbackAndDisableLocks(
+void DelegatedFrameLayerHost::AddOnCommitCallbackAndDisableLocks(
     const base::Closure& callback) {
   ui::Compositor* compositor = client_->GetCompositor();
   DCHECK(compositor);
 
   if (!compositor->HasObserver(this))
     compositor->AddObserver(this);
 
   can_lock_compositor_ = NO_PENDING_COMMIT;
   on_compositing_did_commit_callbacks_.push_back(callback);
 }
 
-void DelegatedFrameHost::AddedToWindow() {
+void DelegatedFrameLayerHost::AddedToWindow() {
   ui::Compositor* compositor = client_->GetCompositor();
   if (compositor) {
     DCHECK(!vsync_manager_);
     vsync_manager_ = compositor->vsync_manager();
     vsync_manager_->AddObserver(this);
   }
 }
 
-void DelegatedFrameHost::RemovingFromWindow() {
+void DelegatedFrameLayerHost::RemovingFromWindow() {
   RunOnCommitCallbacks();
   resize_lock_.reset();
   client_->GetHost()->WasResized();
   ui::Compositor* compositor = client_->GetCompositor();
   if (compositor && compositor->HasObserver(this))
     compositor->RemoveObserver(this);
 
   if (vsync_manager_) {
     vsync_manager_->RemoveObserver(this);
     vsync_manager_ = NULL;
   }
 }
 
-void DelegatedFrameHost::LockResources() {
+void DelegatedFrameLayerHost::LockResources() {
   DCHECK(frame_provider_);
   delegated_frame_evictor_->LockFrame();
 }
 
-void DelegatedFrameHost::UnlockResources() {
+void DelegatedFrameLayerHost::UnlockResources() {
   DCHECK(frame_provider_);
   delegated_frame_evictor_->UnlockFrame();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// DelegatedFrameHost, ui::LayerOwnerDelegate implementation:
+// DelegatedFrameLayerHost, ui::LayerOwnerDelegate implementation:
 
-void DelegatedFrameHost::OnLayerRecreated(ui::Layer* old_layer,
-                                                ui::Layer* new_layer) {
+void DelegatedFrameLayerHost::OnLayerRecreated(ui::Layer* old_layer,
+                                               ui::Layer* new_layer) {
   // The new_layer is the one that will be used by our Window, so that's the one
   // that should keep our frame. old_layer will be returned to the
   // RecreateLayer caller, and should have a copy.
   if (frame_provider_.get()) {
     new_layer->SetShowDelegatedContent(frame_provider_.get(),
                                        current_frame_size_in_dip_);
   }
 }
 
 }  // namespace content
-