Mac: Fix rounded corners on browser windows on retina display.

chrome/browser/ui/cocoa/fast_resize_view.h

Index: chrome/browser/ui/cocoa/fast_resize_view.h
diff --git a/chrome/browser/ui/cocoa/fast_resize_view.h b/chrome/browser/ui/cocoa/fast_resize_view.h
index fb68d95a3adff4ac73157e0cb5ab37b2f3a962b2..8e089866f952ae3b4d898438d02bdac276fd4562 100644
--- a/chrome/browser/ui/cocoa/fast_resize_view.h
+++ b/chrome/browser/ui/cocoa/fast_resize_view.h
@@ -7,6 +7,8 @@
 
 #import <Cocoa/Cocoa.h>
 
+@class CAShapeLayer;
+
 // A Cocoa view that supports an alternate resizing mode, normally used when
 // animations are in progress.  In normal resizing mode, subviews are sized to
 // completely fill this view's bounds.  In fast resizing mode, the subviews'
@@ -16,6 +18,12 @@
 @interface FastResizeView : NSView {
  @private
   BOOL fastResizeMode_;
+
+  // Whether the bottom corners should be rounded.
+  BOOL roundedBottomCorners_;
+
+  // Weak reference to the mask of the hosted layer.
+  CAShapeLayer* layerMask_;
 }
 
 // Turns fast resizing mode on or off, which determines how this view resizes
@@ -24,6 +32,9 @@
 // to trigger a resize.
 - (void)setFastResizeMode:(BOOL)fastResizeMode;
 
+// Changes whether the bottom two corners are rounded.
+- (void)setRoundedBottomCorners:(BOOL)roundedBottomCorners;
+
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_FAST_RESIZE_VIEW_H_