[Mac] Fix the alignment of the new avatar button and the bubble.

Before: https://drive.google.com/file/d/0B1B1Up4p2NRMLTQ1ZFc0blIwbzA/edit?usp=sharing
After: https://drive.google.com/file/d/0B1B1Up4p2NRMVUloNWhYY1luQjg/edit?usp=sharing

BUG=NONE
TEST=Start Chrome with --new-profile-management. Click on the avatar button.
The bubble's right edge should be perfectly aligned to the button's edge.

Review URL: https://codereview.chromium.org/404443008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284603 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/cocoa/profiles/avatar_base_controller.mm

@@ -26,6 +26,9 @@
 
 // Space between the avatar icon and the avatar menu bubble.
 const CGFloat kMenuYOffsetAdjust = 1.0;
+// Offset needed to align the edge of the avatar bubble with the edge of the
+// avatar button.
+const CGFloat kMenuXOffsetAdjust = 2.0;
 
 @interface AvatarBaseController (Private)
 // Shows the avatar bubble.
@@ -153,8 +156,9 @@ class ProfileInfoUpdateObserver : public ProfileInfoCacheObserver,
 
   // The new avatar bubble does not have an arrow, and it should be anchored
   // to the edge of the avatar button.
-  int anchorX = switches::IsNewAvatarMenu() ? NSMaxX([anchor bounds]) :
-                                              NSMidX([anchor bounds]);
+  int anchorX = switches::IsNewAvatarMenu() ?
+      NSMaxX([anchor bounds]) - kMenuXOffsetAdjust :
+      NSMidX([anchor bounds]);
   NSPoint point = NSMakePoint(anchorX,
                               NSMaxY([anchor bounds]) - kMenuYOffsetAdjust);
   point = [anchor convertPoint:point toView:nil];