Mac InfoBar: Use cross platform infobar classes

chrome/browser/ui/cocoa/infobars/infobar_gradient_view.h

Index: chrome/browser/ui/cocoa/infobars/infobar_gradient_view.h
diff --git a/chrome/browser/ui/cocoa/infobars/infobar_gradient_view.h b/chrome/browser/ui/cocoa/infobars/infobar_gradient_view.h
index 48fefc832bcc1fc013adb96d25c8142e796c5836..f78ec6a764c2ad5725b2e1bb1b3db6ba445bf88d 100644
--- a/chrome/browser/ui/cocoa/infobars/infobar_gradient_view.h
+++ b/chrome/browser/ui/cocoa/infobars/infobar_gradient_view.h
@@ -13,13 +13,15 @@
 // A custom view that draws the background gradient for an infobar.
 @interface InfoBarGradientView : VerticalGradientView {
  @private
-  NSPoint tipApex_;
+  CGFloat arrowHeight_;
+  CGFloat arrowHalfWidth_;
+  CGFloat arrowX_;
   BOOL hasTip_;
 }
 
-// The point, in window coordinates, at which the infobar tip is the highest and
-// pointing at the omnibox decoration.
-@property(assign, nonatomic) NSPoint tipApex;
+@property(assign, nonatomic) CGFloat arrowHeight;
+@property(assign, nonatomic) CGFloat arrowHalfWidth;
+@property(assign, nonatomic) CGFloat arrowX;
 @property(assign, nonatomic) BOOL hasTip;
 
 // Sets the infobar type. This will change the view's gradient.