Adding the --load-component-extension flag.

chrome/browser/profiles/profile_impl.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/profiles/profile_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
+#include "base/string_tokenizer.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_classifier.h"
 #include "chrome/browser/autocomplete/network_action_predictor.h"
 #include "chrome/browser/autofill/personal_data_manager.h"
 #include "chrome/browser/background/background_contents_service_factory.h"
 #include "chrome/browser/background/background_mode_manager.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browsing_data_remover.h"
@@ skipping 404 matching lines @@
 #endif
   extension_service_.reset(new ExtensionService(
       this,
       CommandLine::ForCurrentProcess(),
       GetPath().AppendASCII(ExtensionService::kInstallDirectoryName),
       extension_prefs_.get(),
       autoupdate_enabled,
       extensions_enabled));
 
   extension_service_->component_loader()->AddDefaultComponentExtensions();
+  if (command_line->HasSwitch(switches::kLoadComponentExtension)) {
+    CommandLine::StringType path_list = command_line->GetSwitchValueNative(
+        switches::kLoadComponentExtension);
+    StringTokenizerT<CommandLine::StringType,
+        CommandLine::StringType::const_iterator> t(path_list,
+                                                   FILE_PATH_LITERAL(","));
+    while (t.GetNext()) {
+      // Load the component extension manifest synchronously.
+      // Blocking the UI thread is acceptable here since
+      // this flag designated for developers.
+      base::ThreadRestrictions::ScopedAllowIO allow_io;
+      extension_service_->component_loader()->AddOrReplace(
+          FilePath(t.token()));
+    }
+  }
   extension_service_->Init();
 
   if (extensions_enabled) {
     // Load any extensions specified with --load-extension.
     // TODO(yoz): Seems like this should move into ExtensionService::Init.
     if (command_line->HasSwitch(switches::kLoadExtension)) {
       FilePath path = command_line->GetSwitchValuePath(
           switches::kLoadExtension);
       extensions::UnpackedInstaller::Create(extension_service_.get())->
         LoadFromCommandLine(path);
@@ skipping 1167 matching lines @@
                                      FilePath* cache_path,
                                      int* max_size) {
   DCHECK(cache_path);
   DCHECK(max_size);
   FilePath path(prefs_->GetFilePath(prefs::kDiskCacheDir));
   if (!path.empty())
     *cache_path = path;
   *max_size = is_media_context ? prefs_->GetInteger(prefs::kMediaCacheSize) :
                                  prefs_->GetInteger(prefs::kDiskCacheSize);
 }