Bluetooth extension api fixes for WebUI

extensions/browser/api/bluetooth/bluetooth_extension_function.cc

Index: extensions/browser/api/bluetooth/bluetooth_extension_function.cc
diff --git a/extensions/browser/api/bluetooth/bluetooth_extension_function.cc b/extensions/browser/api/bluetooth/bluetooth_extension_function.cc
index 003a8393213f8e56c597358bc243908b1120f18a..028f144ab4fc2c83f28f21f637dd8711e6858dcd 100644
--- a/extensions/browser/api/bluetooth/bluetooth_extension_function.cc
+++ b/extensions/browser/api/bluetooth/bluetooth_extension_function.cc
@@ -6,10 +6,12 @@
 
 #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;
 
@@ -59,6 +61,12 @@ bool BluetoothExtensionFunction::RunAsync() {
   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);