Add a very basic preferences window controller with unit test. Fix the prefs ...

chrome/browser/app_controller_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.
 
 #import "chrome/browser/app_controller_mac.h"
 
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_init.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/browser_shutdown.h"
 #import "chrome/browser/cocoa/bookmark_menu_bridge.h"
+#import "chrome/browser/cocoa/preferences_window_controller.h"
 #include "chrome/browser/command_updater.h"
 #include "chrome/browser/profile_manager.h"
 #include "chrome/common/temp_scaffolding_stubs.h"
 
 @interface AppController(PRIVATE)
 - (void)initMenuState;
 - (void)getUrl:(NSAppleEventDescriptor*)event
      withReply:(NSAppleEventDescriptor*)reply;
 - (void)openFiles:(NSAppleEventDescriptor*)event
         withReply:(NSAppleEventDescriptor*)reply;
@@ skipping 151 matching lines @@
 // openings through that for uniform handling.
 
 namespace {
 
 void OpenURLs(const std::vector<GURL>& urls) {
   CommandLine dummy((std::wstring()));
   BrowserInit::LaunchWithProfile launch(std::wstring(), dummy);
   launch.OpenURLsInBrowser(BrowserList::GetLastActive(), false, urls);
 }
 
-}
+}  // namespace
 
 - (void)getUrl:(NSAppleEventDescriptor*)event
      withReply:(NSAppleEventDescriptor*)reply {
   NSString* urlStr = [[event paramDescriptorForKeyword:keyDirectObject]
                       stringValue];
 
   GURL gurl(base::SysNSStringToUTF8(urlStr));
   std::vector<GURL> gurlVector;
   gurlVector.push_back(gurl);
 
@@ skipping 29 matching lines @@
     GURL gurl(std::string((char*)[fileURLData bytes], [fileURLData length]));
     gurlVector.push_back(gurl);
   }
 
   OpenURLs(gurlVector);
 }
 
 // Show the preferences window, or bring it to the front if it's already
 // visible.
 - (IBAction)showPreferences:(id)sender {
-// TODO(pinkerton): more goes here...
+  if (!prefsController_.get()) {
+    PrefService* prefs = [self defaultProfile]->GetPrefs();
+    prefsController_.reset([[PreferencesWindowController alloc]
+                              initWithPrefs:prefs]);
+  }
+  [prefsController_ showPreferences:sender];
 }
 
 @end