[rAC, OSX] Align bubble arrow based on location.

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

Index: chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.mm
diff --git a/chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.mm b/chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.mm
index 82e25620b893c45f809715c31a2b20dd7da073b4..09e7d77cbe461587ba538b44120c73b1aeb16fa7 100644
--- a/chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.mm
+++ b/chrome/browser/ui/cocoa/autofill/autofill_bubble_controller.mm
@@ -14,6 +14,9 @@ namespace {
 // Border inset for error label.
 const CGFloat kLabelInset = 3.0;
 
+const CGFloat kMaxLabelWidth =
+    2 * autofill::kFieldWidth + autofill::kHorizontalFieldPadding;
+
 }  // namespace
 
 
@@ -40,10 +43,7 @@ const CGFloat kLabelInset = 3.0;
     [label_ setDrawsBackground:NO];
     [label_ setStringValue:message];
     NSSize labelSize = [[label_ cell] cellSizeForBounds:
-        NSMakeRect(
-            0, 0,
-            2 * autofill::kFieldWidth + autofill::kHorizontalFieldPadding,
-            CGFLOAT_MAX)];
+        NSMakeRect(0, 0, kMaxLabelWidth, CGFLOAT_MAX)];
     [label_ setFrameSize:labelSize];
     [label_ setFrameOrigin:NSMakePoint(kLabelInset, kLabelInset)];
 
@@ -59,4 +59,8 @@ const CGFloat kLabelInset = 3.0;
   return self;
 }
 
+- (CGFloat)maxWidth {
+  return kMaxLabelWidth + 2 * kLabelInset;
+}
+
 @end