Lazy-creates BluetoothAdapter in ExtensionBluetoothEventRouter (EBEE).

chrome/browser/extensions/api/bluetooth/bluetooth_apitest.cc

Index: chrome/browser/extensions/api/bluetooth/bluetooth_apitest.cc
diff --git a/chrome/browser/extensions/api/bluetooth/bluetooth_apitest.cc b/chrome/browser/extensions/api/bluetooth/bluetooth_apitest.cc
index 50452e7a7dba92197f398d8a2cb9ab45d8109bff..4fd20aedfdb529a113d36f3c94e4c8f717aa8953 100644
--- a/chrome/browser/extensions/api/bluetooth/bluetooth_apitest.cc
+++ b/chrome/browser/extensions/api/bluetooth/bluetooth_apitest.cc
@@ -59,7 +59,7 @@ class BluetoothApiTest : public ExtensionApiTest {
   }
 
   virtual void CleanUpOnMainThread() OVERRIDE {
-    EXPECT_CALL(*mock_adapter_, RemoveObserver(testing::_));
+    event_router()->SetAdapterForTest(NULL);
   }
 
   void expectBooleanResult(bool expected,
@@ -379,6 +379,8 @@ IN_PROC_BROWSER_TEST_F(BluetoothApiTest, Events) {
   event_router()->AdapterDiscoveringChanged(mock_adapter_, false);
 
   listener.Reply("go");
+  EXPECT_CALL(*mock_adapter_,
+              RemoveObserver(testing::_)).WillOnce(testing::Return());
 
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
 }