Use (i) icon and the same tooltip for the credit cards dialog and account chooser on Mac.

chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.h

Index: chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.h
diff --git a/chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.h b/chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.h
index 02bbee13a5c47990d044fcc3c72a1b718882d494..c996412173f256f40eae34b32e2bc9219a941496 100644
--- a/chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.h
+++ b/chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.h
@@ -29,11 +29,9 @@
 - (id)initWithParentWindow:(NSWindow*)parentWindow
                    message:(NSString*)message
                      inset:(NSSize)inset
+             maxLabelWidth:(CGFloat)maxLabelWidth
              arrowLocation:(info_bubble::BubbleArrowLocation)arrowLocation;
 
-// Maximum width that the bubble will occupy, regardless of message size.
-- (CGFloat)maxWidth;
-
 // Update the current text with |message|.
 - (void)setMessage:(NSString*)message;