Fix regression in background tab color (Mac).

chrome/browser/themes/theme_properties.cc

 // 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 "chrome/browser/themes/theme_properties.h"
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 104 matching lines @@
 
 // Default tints.
 const color_utils::HSL kDefaultTintButtons = {-1, -1, -1};
 // In pre-md, reuse the normal tint for incognito.
 const color_utils::HSL kDefaultTintButtonsIncognito[] = {{-1, -1, -1},
                                                          {-1, -1, 0.85}};
 const color_utils::HSL kDefaultTintFrame = {-1, -1, -1};
 const color_utils::HSL kDefaultTintFrameInactive = {-1, -1, 0.75};
 const color_utils::HSL kDefaultTintFrameIncognito = {-1, 0.2, 0.35};
 const color_utils::HSL kDefaultTintFrameIncognitoInactive = {-1, 0.3, 0.6};
-#if defined(OS_MACOSX)
-const color_utils::HSL kDefaultTintBackgroundTab = { -1, -1, 0.4496875 };
-#else
-  const color_utils::HSL kDefaultTintBackgroundTab = {-1, -1, 0.75};
-#endif  // OS_MACOSX
+const color_utils::HSL kDefaultTintBackgroundTab = {-1, -1, 0.75};
 
 // ----------------------------------------------------------------------------
 // Defaults for properties which are not stored in the browser theme pack.
 
 const SkColor kDefaultColorControlBackground = SK_ColorWHITE;
 const SkColor kDefaultDetachedBookmarkBarSeparator[] = {
     SkColorSetRGB(170, 170, 171), SkColorSetRGB(182, 180, 182)};
 const SkColor kDefaultDetachedBookmarkBarSeparatorIncognito[] = {
     SkColorSetRGB(170, 170, 171), SkColorSetRGB(0x28, 0x28, 0x28)};
 const SkColor kDefaultToolbarTopSeparator = SkColorSetA(SK_ColorBLACK, 0x40);
@@ skipping 255 matching lines @@
 #endif
     case COLOR_FRAME_INCOGNITO:
     case COLOR_FRAME_INCOGNITO_INACTIVE:
       NOTREACHED() << "These values should be queried via their respective "
                       "non-incognito equivalents and an appropriate |otr| "
                       "value.";
     default:
       return gfx::kPlaceholderColor;
   }
 }