[Sync] [Mac] Implement one-click signin bubble for OS X

chrome/test/base/test_browser_window.h

Index: chrome/test/base/test_browser_window.h
diff --git a/chrome/test/base/test_browser_window.h b/chrome/test/base/test_browser_window.h
index 2471e32687a29db255e405409b6d0ad30dad6dfa..f9f114543ffdb74e4bb5fe0aa88b283426161163 100644
--- a/chrome/test/base/test_browser_window.h
+++ b/chrome/test/base/test_browser_window.h
@@ -94,7 +94,9 @@ class TestBrowserWindow : public BrowserWindow {
                                   bool already_bookmarked) OVERRIDE {}
   virtual void ShowChromeToMobileBubble() OVERRIDE {}
 #if defined(ENABLE_ONE_CLICK_SIGNIN)
-  virtual void ShowOneClickSigninBubble() OVERRIDE {}
+  virtual void ShowOneClickSigninBubble(
+      const base::Closure& learn_more_callback,
+      const base::Closure& advanced_callback) OVERRIDE {}
 #endif
   virtual bool IsDownloadShelfVisible() const OVERRIDE;
   virtual DownloadShelf* GetDownloadShelf() OVERRIDE;