Allow getting the theme tint as a value so that it can be applied independent...

chrome/browser/browser_theme_provider_mac.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.
 
 #include "chrome/browser/browser_theme_provider.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
 #include "skia/ext/skia_utils_mac.h"
@@ skipping 34 matching lines @@
     empty_image = [[NSImage alloc] initWithSize:image_rect.size];
     [empty_image lockFocus];
     [[NSColor redColor] set];
     NSRectFill(image_rect);
     [empty_image unlockFocus];
   }
 
   return empty_image;
 }
 
-void BrowserThemeProvider::FreePlatformImages() {
+NSColor* BrowserThemeProvider::GetNSColorTint(int id) {
+  DCHECK(CalledOnValidThread());
+
+  // Check to see if we already have the color in the cache.
+  NSColorMap::const_iterator found = nscolor_cache_.find(id);
+  if (found != nscolor_cache_.end())
+    return found->second;
+
+  TintMap::iterator tint_iter = tints_.find(GetTintKey(id));
+  if (tint_iter != tints_.end()) {
+    skia::HSL tint = tint_iter->second;
+
+    // The tint is HSL, not HSB, but we're cheating for now. TODO(avi,alcor):
+    // determine how much this matters and fix it if necessary.
+    // http://crbug.com/15760
+    NSColor* tint_color = [NSColor colorWithCalibratedHue:tint.h
+                                               saturation:tint.s
+                                               brightness:tint.l
+                                                    alpha:1.0];
+
+    // We loaded successfully.  Cache the color.
+    if (tint_color) {
+      nscolor_cache_[id] = [tint_color retain];
+      return tint_color;
+    }
+  }
+
+  return nil;
+}
+
+void BrowserThemeProvider::FreePlatformCaches() {
   DCHECK(CalledOnValidThread());
 
   // Free images.
   for (NSImageMap::iterator i = nsimage_cache_.begin();
        i != nsimage_cache_.end(); i++) {
     [i->second release];
   }
   nsimage_cache_.clear();
+
+  // Free colors.
+  for (NSColorMap::iterator i = nscolor_cache_.begin();
+       i != nscolor_cache_.end(); i++) {
+    [i->second release];
+  }
+  nscolor_cache_.clear();
 }