Adds a command line switch to allow the user to specify the location...

chrome/browser/profile.cc

 // 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 "chrome/browser/profile.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
@@ skipping 514 matching lines @@
   FilePath pref_file_path = path_;
   pref_file_path = pref_file_path.Append(chrome::kPreferencesFilename);
   return pref_file_path;
 }
 
 URLRequestContext* ProfileImpl::GetRequestContext() {
   if (!request_context_) {
     FilePath cookie_path = GetPath();
     cookie_path = cookie_path.Append(chrome::kCookieFilename);
     FilePath cache_path = GetPath();
+
+    // Override the cache location if specified by the user.
+    const std::wstring user_cache_dir(
+        CommandLine::ForCurrentProcess()->GetSwitchValue(
+            switches::kDiskCacheDir));
+    if (!user_cache_dir.empty()) {
+      cache_path = FilePath::FromWStringHack(user_cache_dir);
+    }
+
     cache_path = cache_path.Append(chrome::kCacheDirname);
     request_context_ = ChromeURLRequestContext::CreateOriginal(
         this, cookie_path, cache_path);
     request_context_->AddRef();
 
     // The first request context is always a normal (non-OTR) request context.
     // Even when Chromium is started in OTR mode, a normal profile is always
     // created first.
     if (!default_request_context_) {
       default_request_context_ = request_context_;
@@ skipping 252 matching lines @@
 }
 
 #ifdef CHROME_PERSONALIZATION
 ProfilePersonalization* ProfileImpl::GetProfilePersonalization() {
   if (!personalization_.get())
     personalization_.reset(
         Personalization::CreateProfilePersonalization(this));
   return personalization_.get();
 }
 #endif