Remove one thread hop while fetching matching rules

chrome/browser/android/data_usage/external_data_use_observer_bridge.cc

Index: chrome/browser/android/data_usage/external_data_use_observer_bridge.cc
diff --git a/chrome/browser/android/data_usage/external_data_use_observer_bridge.cc b/chrome/browser/android/data_usage/external_data_use_observer_bridge.cc
index 63e49661b8afda4599d288df6109992e2e8f4885..65195a1c3ae0c63c4fb8133df6819636b9c653f6 100644
--- a/chrome/browser/android/data_usage/external_data_use_observer_bridge.cc
+++ b/chrome/browser/android/data_usage/external_data_use_observer_bridge.cc
@@ -175,6 +175,15 @@ void ExternalDataUseObserverBridge::OnControlAppInstallStateChange(
   data_use_tab_model_->OnControlAppInstallStateChange(is_control_app_installed);

[tbansal1, 2016/03/10 17:44:55]

Add:
if(!data_use_tab_model_)
   return;

[Raj, 2016/03/10 18:30:11]

Done.

 }
 
+void ExternalDataUseObserverBridge::ShouldRegisterAsDataUseObserver(
+    bool should_register) const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  io_task_runner_->PostTask(
+      FROM_HERE,
+      base::Bind(&ExternalDataUseObserver::ShouldRegisterAsDataUseObserver,
+                 external_data_use_observer_, should_register));
+}
+
 bool RegisterExternalDataUseObserver(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }