Move responsiblity of tab suspending from renderer to TabManager

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 5126b349b06b6168f16dd8caa396a45033cbc552..ef7432ab14f44e94cc08ff8d089fd2b8fc839842 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -1772,6 +1772,11 @@ void RenderThreadImpl::OnProcessBackgrounded(bool backgrounded) {
     renderer_scheduler_->OnRendererForegrounded();
 }
 
+void RenderThreadImpl::OnProcessSuspend() {
+  ChildThreadImpl::OnProcessSuspend();
+  renderer_scheduler_->OnRendererSuspend();
+}
+
 void RenderThreadImpl::OnCreateNewFrame(FrameMsg_NewFrame_Params params) {
   CompositorDependencies* compositor_deps = this;
   RenderFrameImpl::CreateFrame(