NOT FOR COMMIT: Move background pausing to the WebView level

content/renderer/render_thread_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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 1179 matching lines @@
   AddFilter(devtools_agent_message_filter_.get());
 
   if (GetContentClient()->renderer()->RunIdleHandlerWhenWidgetsHidden()) {
     ScheduleIdleHandler(kLongIdleHandlerDelayMs);
   } else {
     // If we do not track widget visibility, then assume conservatively that
     // the isolate is in background. This reduces memory usage.
     isolate->IsolateInBackgroundNotification();
   }
 
-  renderer_scheduler_->SetTimerQueueSuspensionWhenBackgroundedEnabled(
-      GetContentClient()
-          ->renderer()
-          ->AllowTimerSuspensionWhenProcessBackgrounded());
-
   SkGraphics::SetResourceCacheSingleAllocationByteLimit(
       kImageCacheSingleAllocationByteLimit);
 
   // Hook up blink's codecs so skia can call them
   SkGraphics::SetImageGeneratorFromEncodedDataFactory(
       blink::WebImageGenerator::Create);
 
   if (command_line.HasSwitch(switches::kMemoryMetrics)) {
     memory_observer_.reset(new MemoryObserver());
     message_loop()->AddTaskObserver(memory_observer_.get());
@@ skipping 1197 matching lines @@
   }
 }
 
 void RenderThreadImpl::OnRendererInterfaceRequest(
     mojom::RendererAssociatedRequest request) {
   DCHECK(!renderer_binding_.is_bound());
   renderer_binding_.Bind(std::move(request));
 }
 
 }  // namespace content