Load devtools files from resources.pak rather than from disk take 2.

chrome/browser/ui/webui/chrome_url_data_manager_backend.cc

 // Copyright (c) 2011 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/ui/webui/chrome_url_data_manager_backend.h"
 
+#include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/ref_counted_memory.h"
 #include "base/string_util.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/net/view_blob_internals_job_factory.h"
 #include "chrome/browser/net/view_http_cache_job_factory.h"
 #include "chrome/browser/ui/webui/shared_resources_data_source.h"
 #include "chrome/common/chrome_paths.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/url_constants.h"
 #include "content/browser/appcache/view_appcache_internals_job_factory.h"
 #include "content/browser/browser_thread.h"
 #include "googleurl/src/url_util.h"
 #include "grit/platform_locale_settings.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_file_job.h"
 #include "net/url_request/url_request_job.h"
@@ skipping 218 matching lines @@
     scoped_refptr<URLRequestChromeJob> job(i->second);
     pending_requests_.erase(i);
     job->DataAvailable(bytes);
   }
 }
 
 // static
 net::URLRequestJob* ChromeURLDataManagerBackend::Factory(
     net::URLRequest* request,
     const std::string& scheme) {
-  // Try first with a file handler
-  FilePath path;
-  if (DevToolsJobFactory::IsSupportedURL(request->url(), &path))
-    return DevToolsJobFactory::CreateJobForRequest(request, path);
+
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kDebugDevTools)) {
+    // Try loading chrome-devtools:// files from disk.
+    FilePath path;
+    if (DevToolsJobFactory::IsSupportedURL(request->url(), &path))
+      return DevToolsJobFactory::CreateJobForRequest(request, path);
+  }
 
   // Next check for chrome://view-http-cache/*, which uses its own job type.
   if (ViewHttpCacheJobFactory::IsSupportedURL(request->url()))
     return ViewHttpCacheJobFactory::CreateJobForRequest(request);
 
   // Next check for chrome://appcache-internals/, which uses its own job type.
   if (ViewAppCacheInternalsJobFactory::IsSupportedURL(request->url()))
     return ViewAppCacheInternalsJobFactory::CreateJobForRequest(request);
 
   // Next check for chrome://blob-internals/, which uses its own job type.
@@ skipping 135 matching lines @@
     return false;
 
   *path = inspector_dir.AppendASCII(relative_path);
   return true;
 }
 
 net::URLRequestJob* DevToolsJobFactory::CreateJobForRequest(
     net::URLRequest* request, const FilePath& path) {
   return new URLRequestChromeFileJob(request, path);
 }