Add IPC benchmarking API to Blink TestRunner

content/content_shell.gypi

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'content_shell_product_name': 'Content Shell',
     # The "19" is so that sites that sniff for version think that this is
     # something reasonably current; the "77.34.5" is a hint that this isn't a
     # standard Chrome.
@@ skipping 148 matching lines @@
         'shell/common/shell_test_configuration.cc',
         'shell/common/shell_test_configuration.h',
         'shell/common/test_runner/test_preferences.cc',
         'shell/common/test_runner/test_preferences.h',
         'shell/common/webkit_test_helpers.cc',
         'shell/common/webkit_test_helpers.h',
         'shell/geolocation/shell_access_token_store.cc',
         'shell/geolocation/shell_access_token_store.h',
         'shell/renderer/gc_controller.cc',
         'shell/renderer/gc_controller.h',
+        'shell/renderer/ipc_echo.cc',
+        'shell/renderer/ipc_echo.h',
         'shell/renderer/leak_detector.cc',
         'shell/renderer/leak_detector.h',
         'shell/renderer/shell_content_renderer_client.cc',
         'shell/renderer/shell_content_renderer_client.h',
         'shell/renderer/shell_render_frame_observer.cc',
         'shell/renderer/shell_render_frame_observer.h',
         'shell/renderer/shell_render_process_observer.cc',
         'shell/renderer/shell_render_process_observer.h',
         'shell/renderer/shell_render_view_observer.cc',
         'shell/renderer/shell_render_view_observer.h',
@@ skipping 916 matching lines @@
                 '--input_symbol', '<(PRODUCT_DIR)/content_shell.exe.pdb',
                 '--destination_dir', '<(dest_dir)',
               ],
             },
           ],
         },
       ],
     }],  # OS=="win" and fastbuild==0 and target_arch=="ia32"
   ]
 }