Set OS X cache directory to ~/Library/Caches/[app name]/[profile name] ...

base/base_paths_mac.mm

 // Copyright (c) 2006-2008 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 "base/base_paths_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/mac_util.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 
 namespace base {
 
+namespace {
+
+// TODO(akalin): Export this function somewhere and use it in
+// chrome_paths_mac.mm and mac_util.mm.  This is tricky because
+// NSSearchPathDirectory is declared in an Objective C header so we
+// cannot put it in one of the usual locations (where pure C++ files
+// would include them).
+bool GetUserDirectory(NSSearchPathDirectory directory, FilePath* result) {
+  NSArray* dirs =
+      NSSearchPathForDirectoriesInDomains(directory, NSUserDomainMask, YES);
+  if ([dirs count] < 1) {
+    return false;
+  }
+  NSString* path = [dirs objectAtIndex:0];
+  *result = FilePath([path fileSystemRepresentation]);
+  return true;
+}
+
+}  // namespace
+
 bool PathProviderMac(int key, FilePath* result) {
   std::string cur;
   switch (key) {
     case base::FILE_EXE:
     case base::FILE_MODULE: {
       // Executable path can have relative references ("..") depending on
       // how the app was launched.
       NSString* path =
           [[[NSBundle mainBundle] executablePath] stringByStandardizingPath];
       cur = [path fileSystemRepresentation];
       break;
     }
+    case base::DIR_CACHE:
+      return GetUserDirectory(NSCachesDirectory, result);
+    case base::DIR_APP_DATA:
+      return GetUserDirectory(NSApplicationSupportDirectory, result);
     case base::DIR_SOURCE_ROOT: {
       FilePath path;
       PathService::Get(base::DIR_EXE, &path);
       if (mac_util::AmIBundled()) {
         // The bundled app executables (Chromium, TestShell, etc) live five
         // levels down, eg:
         // src/xcodebuild/{Debug|Release}/Chromium.app/Contents/MacOS/Chromium.
         path = path.DirName();
         path = path.DirName();
         path = path.DirName();
         path = path.DirName();
         *result = path.DirName();
       } else {
         // Unit tests execute two levels deep from the source root, eg:
         // src/xcodebuild/{Debug|Release}/base_unittests
         path = path.DirName();
         *result = path.DirName();
       }
       return true;
     }
     default:
       return false;
   }
 
   *result = FilePath(cur);
   return true;
 }
 
 }  // namespace base