[Mac] Remove dead underlayImage_ from GradientButtonCell.

chrome/browser/cocoa/gradient_button_cell.mm

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
 #include "chrome/browser/cocoa/gradient_button_cell.h"
 
 #include "base/logging.h"
 #import "base/scoped_nsobject.h"
 #import "chrome/browser/browser_theme_provider.h"
 #import "chrome/browser/cocoa/image_utils.h"
 #import "chrome/browser/cocoa/themed_window.h"
 #include "grit/theme_resources.h"
 #import "third_party/GTM/AppKit/GTMNSColor+Luminance.h"
 
 @interface GradientButtonCell (Private)
 - (void)sharedInit;
-- (void)drawUnderlayImageWithFrame:(NSRect)cellFrame
-                            inView:(NSView*)controlView;
 
 // Get drawing parameters for a given cell frame in a given view. The inner
 // frame is the one required by |-drawInteriorWithFrame:inView:|. The inner and
 // outer paths are the ones required by |-drawBorderAndFillForTheme:...|. The
 // outer path also gives the area in which to clip. Any of the |return...|
 // arguments may be NULL (in which case the given parameter won't be returned).
 // If |returnInnerPath| or |returnOuterPath|, |*returnInnerPath| or
 // |*returnOuterPath| should be nil, respectively.
 - (void)getDrawParamsForFrame:(NSRect)cellFrame
                        inView:(NSView*)controlView
@@ skipping 86 matching lines @@
 
 - (void)sharedInit {
   shouldTheme_ = YES;
   gradient_.reset([[self gradientForHoverAlpha:0.0 isThemed:NO] retain]);
 }
 
 - (void)setShouldTheme:(BOOL)shouldTheme {
   shouldTheme_ = shouldTheme;
 }
 
-- (NSImage*)underlayImage {
-  return underlayImage_;
-}
-
-- (void)setUnderlayImage:(NSImage*)image {
-  underlayImage_.reset([image retain]);
-
-  [[self controlView] setNeedsDisplay:YES];
-}
-
 - (NSBackgroundStyle)interiorBackgroundStyle {
   // Never lower the interior, since that just leads to a weird shadow which can
   // often interact badly with the theme.
   return NSBackgroundStyleRaised;
 }
 
 - (void)mouseEntered:(NSEvent*)theEvent {
   [self setMouseInside:YES animate:YES];
 }
 
@@ skipping 258 matching lines @@
     if (isTemplate) {
       scoped_nsobject<NSShadow> shadow([[NSShadow alloc] init]);
       NSColor* shadowColor = [color gtm_legibleTextColor];
       shadowColor = [shadowColor colorWithAlphaComponent:0.25];
       [shadow.get() setShadowColor:shadowColor];
       [shadow.get() setShadowOffset:NSMakeSize(0, -1.0)];
       [shadow setShadowBlurRadius:1.0];
       [shadow set];
     }
 
-    [self drawUnderlayImageWithFrame:cellFrame inView:controlView];
-
     CGContextBeginTransparencyLayer(context, 0);
     NSRect imageRect = NSZeroRect;
     imageRect.size = [[self image] size];
     NSRect drawRect = [self imageRectForBounds:cellFrame];
     [[self image] drawInRect:drawRect
                     fromRect:imageRect
                    operation:NSCompositeSourceOver
                     fraction:[self isEnabled] ? 1.0 : 0.5
                 neverFlipped:YES];
     if (isTemplate) {
       if (color) {
         [color set];
         NSRectFillUsingOperation(cellFrame, NSCompositeSourceAtop);
       }
     }
 
     CGContextEndTransparencyLayer(context);
     [NSGraphicsContext restoreGraphicsState];
   } else {
-    [self drawUnderlayImageWithFrame:cellFrame inView:controlView];
-
     // NSCell draws these uncentered for some reason, probably because of the
     // of control in the xib
     [super drawInteriorWithFrame:NSOffsetRect(cellFrame, 0, 1)
                           inView:controlView];
   }
 }
 
-- (void)drawUnderlayImageWithFrame:(NSRect)cellFrame
-                            inView:(NSView*)controlView {
-  if (underlayImage_) {
-    NSRect imageRect = NSZeroRect;
-    imageRect.size = [underlayImage_ size];
-    [underlayImage_ setFlipped:[controlView isFlipped]];
-    [underlayImage_ drawInRect:[self imageRectForBounds:cellFrame]
-                      fromRect:imageRect
-                     operation:NSCompositeSourceOver
-                      fraction:[self isEnabled] ? 1.0 : 0.5];
-  }
-}
-
 - (NSBezierPath*)clipPathForFrame:(NSRect)cellFrame
                            inView:(NSView*)controlView {
   NSBezierPath* boundingPath = nil;
   [self getDrawParamsForFrame:cellFrame
                        inView:controlView
                    innerFrame:NULL
                     innerPath:NULL
                      clipPath:&boundingPath];
   return boundingPath;
 }
 
 @end