Bluetooth extension api fixes for WebUI

extensions/browser/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 "extensions/browser/api/bluetooth/bluetooth_extension_function.h"
 
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/web_contents.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "extensions/browser/api/bluetooth/bluetooth_api.h"
 #include "extensions/browser/api/bluetooth/bluetooth_event_router.h"
+#include "url/gurl.h"
 
 using content::BrowserThread;
 
 namespace {
 
 const char kPlatformNotSupported[] =
     "This operation is not supported on your platform";
 
 extensions::BluetoothEventRouter* GetEventRouter(
     content::BrowserContext* context) {
@@ skipping 29 matching lines @@
   if (!IsBluetoothSupported(browser_context())) {
     SetError(kPlatformNotSupported);
     return false;
   }
   GetAdapter(base::Bind(&BluetoothExtensionFunction::RunOnAdapterReady, this),
              browser_context());
 
   return true;
 }
 
+std::string BluetoothExtensionFunction::GetExtensionId() {
+  if (extension())
+    return extension()->id();
+  return GetSenderWebContents()->GetURL().host();
+}
+
 void BluetoothExtensionFunction::RunOnAdapterReady(
     scoped_refptr<device::BluetoothAdapter> adapter) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DoWork(adapter);
 }
 
 }  // namespace api
 }  // namespace extensions