Mac: Draw download item background like windows does if a theme is installed.

chrome/browser/cocoa/gradient_button_cell.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 "base/scoped_nsobject.h"
 #include "chrome/browser/cocoa/gradient_button_cell.h"
 #import "third_party/GTM/AppKit/GTMTheme.h"
 #import "third_party/GTM/AppKit/GTMNSColor+Luminance.h"
 
 @interface GradientButtonCell (Private)
@@ skipping 147 matching lines @@
 }
 
 - (void)drawBorderAndFillForTheme:(GTMTheme*)theme
                       controlView:(NSView*)controlView
                         outerPath:(NSBezierPath*)outerPath
                         innerPath:(NSBezierPath*)innerPath
               showClickedGradient:(BOOL)showClickedGradient
             showHighlightGradient:(BOOL)showHighlightGradient
                        hoverAlpha:(CGFloat)hoverAlpha
                            active:(BOOL)active
-                        cellFrame:(NSRect)cellFrame {
+                        cellFrame:(NSRect)cellFrame
+                  defaultGradient:(NSGradient*)defaultGradient {
   NSImage* backgroundImage =
       [theme backgroundImageForStyle:GTMThemeStyleToolBarButton state:YES];
 
+  if (!defaultGradient)
+    defaultGradient = gradient_;
+
   if (backgroundImage) {
     NSColor* patternColor = [NSColor colorWithPatternImage:backgroundImage];
     [patternColor set];
     // Set the phase to match window.
     NSRect trueRect = [controlView convertRectToBase:cellFrame];
     [[NSGraphicsContext currentContext]
         setPatternPhase:NSMakePoint(NSMinX(trueRect), NSMaxY(trueRect))];
     [innerPath fill];
   } else {
     if (showClickedGradient) {
@@ skipping 20 matching lines @@
     // Draw the top inner highlight.
     NSAffineTransform* highlightTransform = [NSAffineTransform transform];
     [highlightTransform translateXBy:1 yBy:1];
     scoped_nsobject<NSBezierPath> highlightPath([innerPath copy]);
     [highlightPath transformUsingAffineTransform:highlightTransform];
     [[NSColor colorWithCalibratedWhite:1.0 alpha:0.2] setStroke];
     [highlightPath stroke];
 
     NSGradient *gradient = nil;
     if (hoverAlpha == 0 && !isCustomTheme) {
-      gradient = gradient_;
+      gradient = defaultGradient;
     } else {
       gradient = [self gradientForHoverAlpha:hoverAlpha isThemed:isCustomTheme];
     }
     [gradient drawInBezierPath:innerPath angle:90.0];
 
     [NSGraphicsContext restoreGraphicsState];
   }
 
   // Draw the outer stroke
   NSColor* stroke = [theme strokeColorForStyle:GTMThemeStyleToolBarButton
@@ skipping 54 matching lines @@
       [self isMouseInside]) {
 
     [self drawBorderAndFillForTheme:theme
                         controlView:controlView
                           outerPath:outerPath
                           innerPath:innerPath
                 showClickedGradient:pressed
               showHighlightGradient:[self isHighlighted]
                          hoverAlpha:[self hoverAlpha]
                              active:active
-                          cellFrame:cellFrame];
+                          cellFrame:cellFrame
+                    defaultGradient:nil];
   }
 
   // If this is the left side of a segmented button, draw a slight shadow.
   if (type == kLeftButtonWithShadowType) {
     NSRect borderRect, contentRect;
     NSDivideRect(cellFrame, &borderRect, &contentRect, 1.0, NSMaxXEdge);
     NSColor* stroke = [theme strokeColorForStyle:GTMThemeStyleToolBarButton
                                            state:active];
     [[stroke colorWithAlphaComponent:0.2] set];
     NSRectFillUsingOperation(NSInsetRect(borderRect, 0, 2),
@@ skipping 64 matching lines @@
     imageRect.size = [underlayImage_ size];
     [underlayImage_ setFlipped:[controlView isFlipped]];
     [underlayImage_ drawInRect:[self imageRectForBounds:cellFrame]
                       fromRect:imageRect
                      operation:NSCompositeSourceOver
                       fraction:[self isEnabled] ? 1.0 : 0.5];
   }
 }
 
 @end