Cleanup BrowserPluginGuest::SwapCompositorFrame

BUG=330264

Review URL: https://codereview.chromium.org/588033002

Cr-Commit-Position: refs/heads/master@{#295891}

content/browser/browser_plugin/browser_plugin_guest.cc

@@ -320,12 +320,6 @@ void BrowserPluginGuest::SwapCompositorFrame(
     int host_process_id,
     int host_routing_id,
     scoped_ptr<cc::CompositorFrame> frame) {
-  if (!attached()) {
-    // If the guest doesn't have an embedder then there's nothing to give the
-    // the frame to.
-    return;
-  }
-
   cc::RenderPass* root_pass =
       frame->delegated_frame_data->render_pass_list.back();
   gfx::Size view_size(gfx::ToFlooredSize(gfx::ScaleSize(
@@ -337,30 +331,11 @@ void BrowserPluginGuest::SwapCompositorFrame(
     last_seen_view_size_ = view_size;
   }
 
-  base::SharedMemoryHandle software_frame_handle =
-      base::SharedMemory::NULLHandle();
-  if (frame->software_frame_data) {
-    cc::SoftwareFrameData* frame_data = frame->software_frame_data.get();
-    scoped_ptr<cc::SharedBitmap> bitmap =
-        HostSharedBitmapManager::current()->GetSharedBitmapFromId(
-            frame_data->size, frame_data->bitmap_id);
-    if (!bitmap)
-      return;
-
-    RenderWidgetHostView* embedder_rwhv =
-        GetEmbedderRenderWidgetHostView();
-    base::ProcessHandle embedder_pid =
-        embedder_rwhv->GetRenderWidgetHost()->GetProcess()->GetHandle();
-
-    bitmap->memory()->ShareToProcess(embedder_pid, &software_frame_handle);
-  }
-
   FrameMsg_CompositorFrameSwapped_Params guest_params;
   frame->AssignTo(&guest_params.frame);
   guest_params.output_surface_id = output_surface_id;
   guest_params.producing_route_id = host_routing_id;
   guest_params.producing_host_id = host_process_id;
-  guest_params.shared_memory_handle = software_frame_handle;
 
   SendMessageToEmbedder(
       new BrowserPluginMsg_CompositorFrameSwapped(