ResourceScheduler get visual signal from RenderViewHostImpl

content/browser/renderer_host/render_view_host_impl.cc

 // Copyright (c) 2012 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/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 195 matching lines @@
   GetProcess()->EnableSendQueue();
 
   if (swapped_out) {
     rvh_state_ = STATE_SWAPPED_OUT;
   } else {
     rvh_state_ = STATE_DEFAULT;
     instance_->increment_active_view_count();
   }
 
   if (ResourceDispatcherHostImpl::Get()) {
+    WebContentsImpl* content = static_cast<WebContentsImpl*>(widget_delegate);
+    ResourceScheduler::VisualObserver* observer =
+        ResourceDispatcherHostImpl::Get()->scheduler()->CreateVisualObserver(
+            content);
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::Bind(&ResourceDispatcherHostImpl::OnRenderViewHostCreated,
                    base::Unretained(ResourceDispatcherHostImpl::Get()),
-                   GetProcess()->GetID(), GetRoutingID()));
+                   GetProcess()->GetID(),
+                   GetRoutingID(),
+                   base::Unretained(observer),
+                   !content->IsHidden()));
   }
 
 #if defined(ENABLE_BROWSER_CDMS)
   media_web_contents_observer_.reset(new MediaWebContentsObserver(this));
 #endif
 
   unload_event_monitor_timeout_.reset(new TimeoutMonitor(base::Bind(
       &RenderViewHostImpl::OnSwappedOut, weak_factory_.GetWeakPtr(), true)));
 }
 
@@ skipping 1337 matching lines @@
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->ResetForMainFrameSwap();
 }
 
 void RenderViewHostImpl::SelectWordAroundCaret() {
   Send(new ViewMsg_SelectWordAroundCaret(GetRoutingID()));
 }
 
 }  // namespace content