[iOS] Update today_extension link flags.

pylib/gyp/xcode_emulation.py

 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 This module contains classes that help to emulate xcodebuild behavior on top of
 other build systems, such as make and ninja.
 """
 
 import copy
@@ skipping 840 matching lines @@
     if sdk_root and platform_root and self._IsXCTest():
       ldflags.append('-F' + platform_root + '/Developer/Library/Frameworks/')
       ldflags.append('-framework XCTest')
 
     is_extension = self._IsIosAppExtension() or self._IsIosWatchKitExtension()
     if sdk_root and is_extension:
       # Adds the link flags for extensions. These flags are common for all
       # extensions and provide loader and main function.
       # These flags reflect the compilation options used by xcode to compile
       # extensions.
-      ldflags.append('-lpkstart')
       if XcodeVersion() < '0900':
+        ldflags.append('-lpkstart')
         ldflags.append(sdk_root +
             '/System/Library/PrivateFrameworks/PlugInKit.framework/PlugInKit')
+      else:
+        ldflags.append('-e _NSExtensionMain')
       ldflags.append('-fapplication-extension')
-      ldflags.append('-Xlinker -rpath '
-          '-Xlinker @executable_path/../../Frameworks')
 
     self._Appendf(ldflags, 'CLANG_CXX_LIBRARY', '-stdlib=%s')
 
     self.configname = None
     return ldflags
 
   def GetLibtoolflags(self, configname):
     """Returns flags that need to be passed to the static linker.
 
     Args:
@@ skipping 764 matching lines @@
       if toolset == 'target':
         iphoneos_config_dict['xcode_settings']['SDKROOT'] = 'iphoneos'
   return targets
 
 def CloneConfigurationForDeviceAndEmulator(target_dicts):
   """If |target_dicts| contains any iOS targets, automatically create -iphoneos
   targets for iOS device builds."""
   if _HasIOSTarget(target_dicts):
     return _AddIOSDeviceConfigurations(target_dicts)
   return target_dicts