Move nsimage_cache into base so that it can be accessed from outside of chrome

base/nsimage_cache_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/cocoa/nsimage_cache.h"
+#include "base/nsimage_cache_mac.h"
+
+#import <AppKit/AppKit.h>
 
 #include "base/logging.h"
 #include "base/mac_util.h"
 
 // When C++ exceptions are disabled, the C++ library defines |try| and
 // |catch| so as to allow exception-expecting C++ code to build properly when
 // language support for exceptions is not present.  These macros interfere
 // with the use of |@try| and |@catch| in Objective-C files such as this one.
 // Undefine these macros here, after everything has been #included, since
 // there will be no C++ uses and only Objective-C uses from this point on.
 #undef try
 #undef catch
 
 namespace nsimage_cache {
 
-static NSMutableDictionary *image_cache = nil;
+static NSMutableDictionary* image_cache = nil;
 
-NSImage *ImageNamed(NSString *name) {
+NSImage* ImageNamed(NSString* name) {
   DCHECK(name);
 
   // NOTE: to make this thread safe, we'd have to sync on the cache and
   // also force all the bundle calls on the main thread.
 
   if (!image_cache) {
     image_cache = [[NSMutableDictionary alloc] init];
     DCHECK(image_cache);
   }
 
-  NSImage *result = [image_cache objectForKey:name];
+  NSImage* result = [image_cache objectForKey:name];
   if (!result) {
     DLOG_IF(INFO, [[name pathExtension] length] == 0)
         << "Suggest including the extension in the image name";
 
-    NSString *path = [mac_util::MainAppBundle() pathForImageResource:name];
+    NSString* path = [mac_util::MainAppBundle() pathForImageResource:name];
     if (path) {
       @try {
         result = [[[NSImage alloc] initWithContentsOfFile:path] autorelease];
         if (result)
           [image_cache setObject:result forKey:name];
       }
       @catch (id err) {
         DLOG(ERROR) << "Failed to load the image for name '"
             << [name UTF8String] << "' from path '" << [path UTF8String]
             << "', error: " << [err description];
         result = nil;
       }
     }
   }
 
   // TODO: if we ever limit the cache size, this should retain & autorelease
   // the image.
   return result;
 }
 
 void Clear(void) {
   // NOTE: to make this thread safe, we'd have to sync on the cache.
   [image_cache removeAllObjects];
 }
 
 }  // namespace nsimage_cache