chrome.bluetooth API improvements.

chrome/browser/extensions/api/bluetooth/bluetooth_extension_function.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 "chrome/browser/extensions/api/bluetooth/bluetooth_extension_function.h"
 
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/api/bluetooth/bluetooth_api.h"
 #include "chrome/browser/extensions/api/bluetooth/bluetooth_event_router.h"
+#include "content/public/browser/browser_thread.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 
+using content::BrowserThread;
+
 namespace {
 
 const char kPlatformNotSupported[] =
     "This operation is not supported on your platform";
 
 extensions::BluetoothEventRouter* GetEventRouter(
     content::BrowserContext* context) {
-  return extensions::BluetoothAPI::Get(context)->bluetooth_event_router();
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  return extensions::BluetoothAPI::Get(context)->event_router();
 }
 
 bool IsBluetoothSupported(content::BrowserContext* context) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return GetEventRouter(context)->IsBluetoothSupported();
 }
 
 void GetAdapter(const device::BluetoothAdapterFactory::AdapterCallback callback,
                 content::BrowserContext* context) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   GetEventRouter(context)->GetAdapter(callback);
 }
 
 }  // namespace
 
 namespace extensions {
-
 namespace api {
 
 BluetoothExtensionFunction::BluetoothExtensionFunction() {
 }
 
 BluetoothExtensionFunction::~BluetoothExtensionFunction() {
 }
 
 bool BluetoothExtensionFunction::RunImpl() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
   if (!IsBluetoothSupported(browser_context())) {
     SetError(kPlatformNotSupported);
     return false;
   }
   GetAdapter(base::Bind(&BluetoothExtensionFunction::RunOnAdapterReady, this),
              browser_context());
 
   return true;
 }
 
 void BluetoothExtensionFunction::RunOnAdapterReady(
     scoped_refptr<device::BluetoothAdapter> adapter) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   DoWork(adapter);
 }
 
 }  // namespace api
-
 }  // namespace extensions