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

chrome/browser/ui/cocoa/fast_resize_view.mm

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/fast_resize_view.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #include "ui/base/cocoa/animation_utils.h"
 
-namespace {
-
-// The radius of the rounded corners.
-const CGFloat kRoundedCornerRadius = 4;
-
-}  // namespace
-
-@interface FastResizeView (PrivateMethods)
-// Creates a path whose bottom two corners are rounded.
-// Caller takes ownership of the path.
-- (CGPathRef)createRoundedBottomCornersPath:(NSSize)size;
-
-// Updates the path of the layer mask to reflect the current value of
-// roundedBottomCorners_.
-- (void)updateLayerMask;
-@end
-
 @implementation FastResizeView
 
 - (id)initWithFrame:(NSRect)frameRect {
   if ((self = [super initWithFrame:frameRect])) {
     ScopedCAActionDisabler disabler;
     base::scoped_nsobject<CALayer> layer([[CALayer alloc] init]);
     [layer setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)];
     [self setLayer:layer];
     [self setWantsLayer:YES];
-
-    roundedBottomCorners_ = YES;
-    [self updateLayerMask];
   }
   return self;
 }
 
 - (BOOL)isOpaque {
   return YES;
 }
 
-- (void)setRoundedBottomCorners:(BOOL)roundedBottomCorners {
-  if (roundedBottomCorners == roundedBottomCorners_)
-    return;
-
-  roundedBottomCorners_ = roundedBottomCorners;
-  [self updateLayerMask];
-}
-
-// Every time the frame's size changes, the layer mask needs to be updated.
-- (void)setFrameSize:(NSSize)newSize {
-  [super setFrameSize:newSize];
-  [self updateLayerMask];
-}
-
 @end
 
-@implementation FastResizeView (PrivateMethods)
-
-- (CGPathRef)createRoundedBottomCornersPath:(NSSize)size {
-  CGMutablePathRef path = CGPathCreateMutable();
-  CGFloat width = size.width;
-  CGFloat height = size.height;
-  CGFloat cornerRadius = kRoundedCornerRadius;
-
-  // Top left corner.
-  CGPathMoveToPoint(path, NULL, 0, height);
-
-  // Top right corner.
-  CGPathAddLineToPoint(path, NULL, width, height);
-
-  // Bottom right corner.
-  CGPathAddArc(path,
-               NULL,
-               width - cornerRadius,
-               cornerRadius,
-               cornerRadius,
-               0,
-               -M_PI_2,
-               true);
-
-  // Bottom left corner.
-  CGPathAddArc(path,
-               NULL,
-               cornerRadius,
-               cornerRadius,
-               cornerRadius,
-               -M_PI_2,
-               -M_PI,
-               true);
-
-  // Draw line back to top-left corner.
-  CGPathAddLineToPoint(path, NULL, 0, height);
-  CGPathCloseSubpath(path);
-  return path;
-}
-
-- (void)updateLayerMask {
-  if (!roundedBottomCorners_) {
-    [self layer].mask = nil;
-    layerMask_ = nil;
-    return;
-  }
-
-  if (![self layer].mask) {
-    layerMask_ = [CAShapeLayer layer];
-    [self layer].mask = layerMask_;
-  }
-
-  CGPathRef path = [self createRoundedBottomCornersPath:self.bounds.size];
-  layerMask_.path = path;
-  CGPathRelease(path);
-}
-
-@end