Use iframe in blink_perf.pywebsocket perf tests to remove --disable-web-security

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 222 matching lines @@
     Var('chromium_git') + '/external/libphonenumber/cpp/src/phonenumbers.git' + '@' + '0d6e3e50e17c94262ad1ca3b7d52b11223084bca',
   'src/third_party/libphonenumber/src/test':
     Var('chromium_git') + '/external/libphonenumber/cpp/test.git' + '@' + 'f351a7e007f9c9995494499120bbc361ca808a16',
   'src/third_party/libphonenumber/src/resources':
     Var('chromium_git') + '/external/libphonenumber/resources.git' + '@' + 'b6dfdc7952571ff7ee72643cd88c988cbe966396',
 
   'src/third_party/webpagereplay':
    Var('chromium_git') + '/external/github.com/chromium/web-page-replay.git' + '@' + '7564939bdf6482d57b9bd5e9c931679f96d8cf75',
 
   'src/third_party/pywebsocket/src':
-    Var('chromium_git') + '/external/github.com/google/pywebsocket.git' + '@' + '09d842794c14ca064f8a4223b313ac2c84bd33c8',
+    Var('chromium_git') + '/external/github.com/google/pywebsocket.git' + '@' + '2d7b73c3acbd0f41dcab487ae5c97c6feae06ce2',
 
   'src/third_party/opus/src':
    Var('chromium_git') + '/chromium/deps/opus.git' + '@' + 'cae696156f1e60006e39821e79a1811ae1933c69',
 
   'src/media/cdm/api':
    Var('chromium_git') + '/chromium/cdm.git' + '@' + 'a4773c3cec827c3a880e8a2c22e43a287ced0d20',
 
   'src/third_party/mesa/src':
    Var('chromium_git') + '/chromium/deps/mesa.git' + '@' + 'ef811c6bd4de74e13e7035ca882cc77f85793fef',
 
@@ skipping 557 matching lines @@
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     'name': 'gyp',
     'pattern': '.',
     'action': ['python', 'src/build/gyp_chromium'],
   },
 ]