bluetooth: Initial simple mock content::WebBluetoothImpl.

content/shell/renderer/test_runner/test_runner.h

Index: content/shell/renderer/test_runner/test_runner.h
diff --git a/content/shell/renderer/test_runner/test_runner.h b/content/shell/renderer/test_runner/test_runner.h
index 9b3737f33f88e839068d276b1a83ad70c08a0889..69c5cb646ec0b243e45683ac85c525b7f5858429 100644
--- a/content/shell/renderer/test_runner/test_runner.h
+++ b/content/shell/renderer/test_runner/test_runner.h
@@ -510,6 +510,9 @@ class TestRunner : public WebTestRunner,
   void SetColorProfile(const std::string& name,
                        v8::Handle<v8::Function> callback);
 
+  // Change the bluetooth test data while running a layout test.
+  void SetBluetoothMockDataSet(const std::string& name);
+
   // Calls setlocale(LC_ALL, ...) for a specified locale.
   // Resets between tests.
   void SetPOSIXLocale(const std::string& locale);