bluetooth: Initial simple mock content::WebBluetoothImpl.

content/shell/renderer/test_runner/web_test_delegate.h

Index: content/shell/renderer/test_runner/web_test_delegate.h
diff --git a/content/shell/renderer/test_runner/web_test_delegate.h b/content/shell/renderer/test_runner/web_test_delegate.h
index 459a1408619127470b1ab6752740501e2c063023..ac42c9759edb79a7c72f0792462a59217c0141ad 100644
--- a/content/shell/renderer/test_runner/web_test_delegate.h
+++ b/content/shell/renderer/test_runner/web_test_delegate.h
@@ -149,6 +149,9 @@ class WebTestDelegate {
   // Change the device color profile while running a layout test.
   virtual void SetDeviceColorProfile(const std::string& name) = 0;
 
+  // Change the bluetooth test data while running a layout test.
+  virtual void SetBluetoothMockDataSet(const std::string& data_set) = 0;
+
   // Controls which WebView should be focused.
   virtual void SetFocus(WebTestProxyBase* proxy, bool focus) = 0;