Mac: Fix up location bar decoration bubble anchoring.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
index 00a78454ae71680e2c627b47c053a1f58a145486..9e9dc9bad7bdc58bd7800fc4fc738cb0168323f8 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
@@ -291,13 +291,10 @@ const CGFloat kAnimationDuration = 0.2;
   if (!ui::MaterialDesignController::IsSecondaryUiMaterial())
     return [self arrowAnchorPointForDecoration:decoration];
 
-  // Under MD, dialogs have no arrow and anchor to corner of the decoration
+  // Under MD, dialogs have no arrow and anchor to corner of the location bar
   // frame, not a specific point within it. See http://crbug.com/566115.
-  BOOL isLeftDecoration;
-  const NSRect frame =
-      [[self cell] backgroundFrameForDecoration:decoration
-                                        inFrame:[self bounds]
-                               isLeftDecoration:&isLeftDecoration];
+  BOOL isLeftDecoration = [[self cell] isLeftDecoration:decoration];
+  const NSRect frame = [self bounds];
   NSPoint point = NSMakePoint(isLeftDecoration ? NSMinX(frame) : NSMaxX(frame),
                               NSMaxY(frame));
   return [self convertPoint:point toView:nil];