ResourceScheduler get visual signal from RenderViewHostImpl

content/browser/loader/resource_dispatcher_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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <algorithm>
 #include <set>
@@ skipping 1305 matching lines @@
       false,     // enable_load_timing
       blink::WebReferrerPolicyDefault,
       blink::WebPageVisibilityStateVisible,
       context,
       base::WeakPtr<ResourceMessageFilter>(),  // filter
       true);     // is_async
 }
 
 void ResourceDispatcherHostImpl::OnRenderViewHostCreated(
     int child_id,
-    int route_id) {
-  scheduler_->OnClientCreated(child_id, route_id);
+    int route_id,
+    bool is_visible) {
+  scheduler_->OnClientCreated(child_id, route_id, is_visible);
 }
 
 void ResourceDispatcherHostImpl::OnRenderViewHostDeleted(
     int child_id,
     int route_id) {
   scheduler_->OnClientDeleted(child_id, route_id);
   CancelRequestsForRoute(child_id, route_id);
 }
 
+void ResourceDispatcherHostImpl::OnRenderViewHostWasHidden(
+    int child_id,
+    int route_id) {
+  scheduler_->OnVisibilityChanged(child_id, route_id, false);
+}
+
+void ResourceDispatcherHostImpl::OnRenderViewHostWasShown(
+    int child_id,
+    int route_id) {
+  scheduler_->OnVisibilityChanged(child_id, route_id, true);
+}
+
 // This function is only used for saving feature.
 void ResourceDispatcherHostImpl::BeginSaveFile(
     const GURL& url,
     const Referrer& referrer,
     int child_id,
     int route_id,
     ResourceContext* context) {
   if (is_shutdown_)
     return;
 
@@ skipping 650 matching lines @@
 
   // Add a flag to selectively bypass the data reduction proxy if the resource
   // type is not an image.
   if (request_data.resource_type != RESOURCE_TYPE_IMAGE)
     load_flags |= net::LOAD_BYPASS_DATA_REDUCTION_PROXY;
 
   return load_flags;
 }
 
 }  // namespace content