Show avatar menu from NTP4

chrome/browser/ui/cocoa/browser_window_cocoa.mm

Index: chrome/browser/ui/cocoa/browser_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_cocoa.mm b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
index af78b51df6919bbcff7446c3ffaf0c1262719b17..fa08f2dcef60735c118c2aeb1840516a6b935818 100644
--- a/chrome/browser/ui/cocoa/browser_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
@@ -575,3 +575,17 @@ void BrowserWindowCocoa::UpdateSidebarForContents(TabContents* tab_contents) {
     [controller_ updateSidebarForContents:tab_contents];
   }
 }
+
+void BrowserWindowCocoa::ShowAvatarBubble(TabContents* tab_contents,
+                                          int x, int y) {
+  NSView* view = tab_contents->GetNativeView();
+  NSPoint point = NSMakePoint(x, y);
+  point = [view convertPoint:point toView:nil];
+  point = [[view window] convertBaseToScreen:point];
+
+  // |menu| will automatically release itself on close.
+  AvatarMenuBubbleController* menu =
+      [[AvatarMenuBubbleController alloc] initWithBrowser:browser_
+                                               anchoredAt:point];
+  [menu showWindow:nil];
+}