[Mac] Website settings: Implement custom tab appearance.

chrome/browser/ui/cocoa/info_bubble_view.mm

 // Copyright (c) 2012 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/info_bubble_view.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_nsobject.h"
 
 @implementation InfoBubbleView
 
 @synthesize arrowLocation = arrowLocation_;
 @synthesize alignment = alignment_;
+@synthesize backgroundColor = backgroundColor_;
 
 - (id)initWithFrame:(NSRect)frameRect {
   if ((self = [super initWithFrame:frameRect])) {
     arrowLocation_ = info_bubble::kTopLeft;
     alignment_ = info_bubble::kAlignArrowToAnchor;
+    [self setBackgroundColor:[NSColor colorWithCalibratedWhite:1.0 alpha:0.9]];
   }
   return self;
 }
 
 - (void)drawRect:(NSRect)rect {
   // Make room for the border to be seen.
   NSRect bounds = [self bounds];
   if (arrowLocation_ != info_bubble::kNoArrow) {
     bounds.size.height -= info_bubble::kBubbleArrowHeight;
   }
@@ skipping 26 matching lines @@
   [bezier moveToPoint:NSMakePoint(arrowStart.x, arrowStart.y)];
   if (arrowLocation_ != info_bubble::kNoArrow) {
     [bezier lineToPoint:NSMakePoint(arrowStart.x +
                                         info_bubble::kBubbleArrowWidth / 2.0,
                                     arrowStart.y +
                                         info_bubble::kBubbleArrowHeight)];
   }
   [bezier lineToPoint:NSMakePoint(arrowStart.x + info_bubble::kBubbleArrowWidth,
                                   arrowStart.y)];
   [bezier closePath];
-  [[NSColor colorWithCalibratedWhite:1.0 alpha:0.9] set];
+  [backgroundColor_ set];
   [bezier fill];
 }
 
 - (NSPoint)arrowTip {
   NSRect bounds = [self bounds];
   CGFloat tipXOffset =
       info_bubble::kBubbleArrowXOffset + info_bubble::kBubbleArrowWidth / 2.0;
   CGFloat xOffset =
       (arrowLocation_ == info_bubble::kTopRight) ? NSMaxX(bounds) - tipXOffset :
                                                    NSMinX(bounds) + tipXOffset;
   NSPoint arrowTip = NSMakePoint(xOffset, NSMaxY(bounds));
   return arrowTip;
 }
 
 @end