Tweaks to make the toolkit-views HTTP Auth dialog more Maccy on MAc

ui/native_theme/native_theme_mac.mm

 // Copyright (c) 2013 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 "ui/native_theme/native_theme_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/mac/mac_util.h"
@@ skipping 24 matching lines @@
 // Values calculated by reading pixels and solving simultaneous equations
 // derived from "A over B" alpha compositing. Steps: Sample the semi-transparent
 // pixel over two backgrounds; P1, P2 over backgrounds B1, B2. Use the color
 // value between 0.0 and 1.0 (i.e. divide by 255.0). Then,
 // alpha = (P2 - P1 + B1 - B2) / (B1 - B2)
 // color = (P1 - B1 + alpha * B1) / alpha.
 const SkColor kMenuPopupBackgroundColor = SkColorSetARGB(251, 255, 255, 255);
 const SkColor kMenuSeparatorColor = SkColorSetARGB(243, 228, 228, 228);
 const SkColor kMenuBorderColor = SkColorSetARGB(60, 0, 0, 0);
 
-// Hardcoded color used for some existing dialogs in Chrome's Cocoa UI.
-const SkColor kDialogBackgroundColor = SkColorSetRGB(251, 251, 251);
+// New "webui-style" bubbles and dialogs on Mac use a white background.
+const SkColor kDialogBackgroundColor = SK_ColorWHITE;
 
 // On 10.6 and 10.7 there is no way to get components from system colors. Here,
 // system colors are just opaque objects that can paint themselves and otherwise
 // tell you nothing. In 10.8, some of the system color classes have incomplete
 // implementations and throw exceptions even attempting to convert using
 // -[NSColor colorUsingColorSpace:], so don't bother there either.
 // This function paints a single pixel to a 1x1 swatch and reads it back.
 SkColor GetSystemColorUsingSwatch(NSColor* color) {
   SkColor swatch;
   base::ScopedCFTypeRef<CGColorSpaceRef> color_space(
@@ skipping 306 matching lines @@
   set_scrollbar_button_length(0);
   SetScrollbarColors(kScrollerThumbColor,
                      kScrollerThumbHoverColor,
                      kScrollerTrackGradientColors[0]);
 }
 
 NativeThemeMac::~NativeThemeMac() {
 }
 
 }  // namespace ui