[UseZoomForDSF] Guest view support

content/renderer/child_frame_compositing_helper.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/renderer/child_frame_compositing_helper.h"
 
 #include <utility>
 
 #include "cc/blink/web_layer_impl.h"
 #include "cc/layers/delegated_frame_provider.h"
 #include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/layers/delegated_renderer_layer.h"
 #include "cc/layers/solid_color_layer.h"
 #include "cc/layers/surface_layer.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
 #include "cc/resources/single_release_callback.h"
 #include "content/child/thread_safe_sender.h"
 #include "content/common/browser_plugin/browser_plugin_messages.h"
+#include "content/common/content_switches_internal.h"
 #include "content/common/frame_messages.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "content/renderer/browser_plugin/browser_plugin.h"
 #include "content/renderer/browser_plugin/browser_plugin_manager.h"
 #include "content/renderer/render_frame_impl.h"
 #include "content/renderer/render_frame_proxy.h"
 #include "content/renderer/render_thread_impl.h"
 #include "skia/ext/image_operations.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebPluginContainer.h"
@@ skipping 276 matching lines @@
       render_frame_proxy_
           ? base::Bind(&ChildFrameCompositingHelper::RequireCallback, sender,
                        host_routing_id_)
           : base::Bind(
                 &ChildFrameCompositingHelper::RequireCallbackBrowserPlugin,
                 sender, host_routing_id_,
                 browser_plugin_->browser_plugin_instance_id());
   scoped_refptr<cc::SurfaceLayer> surface_layer =
       cc::SurfaceLayer::Create(cc_blink::WebLayerImpl::LayerSettings(),
                                satisfy_callback, require_callback);
+  // TODO(oshima): This is a stopgap fix so that the compositor does not
+  // scaledown the content when 2x frame data is added to 1x parent frame data.
+  // Fix this in cc/.
+  if (IsUseZoomForDSFEnabled())
+    scale_factor = 1.0f;
+
   surface_layer->SetSurfaceId(surface_id, scale_factor, frame_size);
   blink::WebLayer* layer = new cc_blink::WebLayerImpl(surface_layer);
   UpdateWebLayer(layer);
 
   UpdateVisibility(true);
 
   // The RWHV creates a destruction dependency on the surface that needs to be
   // satisfied. Note: render_frame_proxy_ is null in the case our client is a
   // BrowserPlugin; in this case the BrowserPlugin sends its own SatisfySequence
   // message.
@@ skipping 28 matching lines @@
         &params.ack.resources);
   DCHECK(!params.ack.resources.empty());
 
   params.route_id = last_route_id_;
   params.output_surface_id = last_output_surface_id_;
   params.renderer_host_id = last_host_id_;
   SendReclaimCompositorResourcesToBrowser(params);
 }
 
 }  // namespace content