Revert of Introduce components/display_compositor

content/browser/renderer_host/delegated_frame_host.h

Index: content/browser/renderer_host/delegated_frame_host.h
diff --git a/content/browser/renderer_host/delegated_frame_host.h b/content/browser/renderer_host/delegated_frame_host.h
index 183265968c7274d4d27f72d56c622c57d159a88e..58faa7301f421b66a055a5d7d838fd29f747b34c 100644
--- a/content/browser/renderer_host/delegated_frame_host.h
+++ b/content/browser/renderer_host/delegated_frame_host.h
@@ -40,13 +40,10 @@
 class VideoFrame;
 }
 
-namespace display_compositor {
+namespace content {
+
+class DelegatedFrameHost;
 class ReadbackYUVInterface;
-}
-
-namespace content {
-
-class DelegatedFrameHost;
 class RenderWidgetHostViewFrameSubscriber;
 class RenderWidgetHostImpl;
 class ResizeLock;
@@ -318,8 +315,7 @@
       request_copy_of_output_callback_for_testing_;
 
   // YUV readback pipeline.
-  std::unique_ptr<display_compositor::ReadbackYUVInterface>
-      yuv_readback_pipeline_;
+  std::unique_ptr<content::ReadbackYUVInterface> yuv_readback_pipeline_;
 
   std::unique_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 };