Remove one thread hop while fetching matching rules

chrome/browser/android/data_usage/external_data_use_observer_bridge.cc

 // Copyright 2015 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 "chrome/browser/android/data_usage/external_data_use_observer_bridge.h"
 
 #include <vector>
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_string.h"
@@ skipping 154 matching lines @@
   io_task_runner_->PostTask(
       FROM_HERE, base::Bind(&ExternalDataUseObserver::OnReportDataUseDone,
                             external_data_use_observer_, success));
 }
 
 void ExternalDataUseObserverBridge::OnControlAppInstallStateChange(
     JNIEnv* env,
     jobject obj,
     bool is_control_app_installed) const {
   DCHECK(thread_checker_.CalledOnValidThread());
-  data_use_tab_model_->OnControlAppInstallStateChange(is_control_app_installed);
+  if (data_use_tab_model_) {
+    data_use_tab_model_->OnControlAppInstallStateChange(
+        is_control_app_installed);
+  }
+}
+
+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);
 }
 
 }  // namespace android
 
 }  // namespace chrome