Revert 189969 "Add RenderWidgetHost::GetSnapshotFromRenderer met..."

content/browser/renderer_host/media/web_contents_video_capture_device.cc

Index: content/browser/renderer_host/media/web_contents_video_capture_device.cc
===================================================================
--- content/browser/renderer_host/media/web_contents_video_capture_device.cc	(revision 190011)
+++ content/browser/renderer_host/media/web_contents_video_capture_device.cc	(working copy)
@@ -989,15 +989,7 @@
   TRACE_EVENT_ASYNC_BEGIN1("mirroring", "Capture", this,
                            "frame_number", frame_number);
 
-  if (!view->IsSurfaceAvailableForCopy()) {
-    // Fallback to the more expensive renderer-side copy if the surface and
-    // backing store are not accessible.
-    rwh->GetSnapshotFromRenderer(
-        gfx::Rect(),
-        base::Bind(&BackingStoreCopier::DidCopyFromBackingStore,
-                   base::Unretained(this), frame_number,
-                   base::Time::Now(), callback));
-  } else if (view && view->CanCopyToVideoFrame()) {
+  if (view && view->CanCopyToVideoFrame()) {
     gfx::Size view_size = view->GetViewBounds().size();
 
     view->CopyFromCompositingSurfaceToVideoFrame(