[Android] Suspend shared timers for hidden renderers

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 <vector>
@@ skipping 1610 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateScrollbarTheme, OnUpdateScrollbarTheme)
 #endif
 #if defined(ENABLE_PLUGINS)
     IPC_MESSAGE_HANDLER(ViewMsg_PurgePluginListCache, OnPurgePluginListCache)
 #endif
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
+void RenderThreadImpl::OnProcessBackgrounded(bool backgrounded) {
+  ChildThreadImpl::OnProcessBackgrounded(backgrounded);
+
+  if (backgrounded)
+    renderer_scheduler_->OnRendererBackgrounded();
+  else
+    renderer_scheduler_->OnRendererForegrounded();
+}
+
 void RenderThreadImpl::OnCreateNewFrame(FrameMsg_NewFrame_Params params) {
   CompositorDependencies* compositor_deps = this;
   RenderFrameImpl::CreateFrame(
       params.routing_id, params.parent_routing_id,
       params.previous_sibling_routing_id, params.proxy_routing_id,
       params.replication_state, compositor_deps, params.widget_params);
 }
 
 void RenderThreadImpl::OnCreateNewFrameProxy(
     int routing_id,
@@ skipping 318 matching lines @@
 }
 
 void RenderThreadImpl::PendingRenderFrameConnect::OnConnectionError() {
   size_t erased =
       RenderThreadImpl::current()->pending_render_frame_connects_.erase(
           routing_id_);
   DCHECK_EQ(1u, erased);
 }
 
 }  // namespace content