Remove CHROME_V8 #define and related javascript_engine gyp variable.

build/common.gypi

 # 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 19 matching lines @@
           # that GTK and PureViews can coexist. This intermediate solution
           # allow us to switch the view implementations using
           # --use-pure-views, without breaking exiting gtk implementation.
           'toolkit_uses_pure_views%': 0,
 
           # Disable touch support by default.
           'touchui%': 0,
 
           # Disable webui dialog replacements for native dialogs by default.
           # TODO(flackr): Change this to a runtime flag triggered by
-          #     --pure-views so that these dialogs can be easily tested. 
+          #     --pure-views so that these dialogs can be easily tested.
           'webui_dialogs%': 0,
 
           # Whether the compositor is enabled on views.
           'views_compositor%': 0,
-          
+
           # Whether or not we are building with the Aura window manager.
           'use_aura%': 0,
         },
         # Copy conditionally-set variables out one scope.
         'chromeos%': '<(chromeos)',
         'toolkit_uses_pure_views%': '<(toolkit_uses_pure_views)',
         'touchui%': '<(touchui)',
         'webui_dialogs%': '<(webui_dialogs)',
         'views_compositor%': '<(views_compositor)',
         'use_aura%': '<(use_aura)',
@@ skipping 22 matching lines @@
           ['touchui==1', {
             'toolkit_uses_pure_views%': 1,
           }, {
             'toolkit_uses_pure_views%': 0,
           }],
 
           # Use WebUI dialogs in TouchUI builds.
           ['touchui==1', {
             'webui_dialogs%': 1,
           }],
-          
+
           # Use the views compositor when using the Aura window manager.
           ['use_aura==1', {
             'views_compositor%': 1,
           }],
         ],
       },
 
       # Copy conditionally-set variables out one scope.
       'chromeos%': '<(chromeos)',
       'touchui%': '<(touchui)',
@@ skipping 163 matching lines @@
         }, {
           'enable_flapper_hacks%': 0,
         }],
 
         # Enable file manager extension by default on Chrome OS.
         ['chromeos==1', {
           'file_manager_extension%': 1,
         }, {
           'file_manager_extension%': 0,
         }],
-        
+
         # Enable WebUI TaskManager only on Chrome OS and Touch UI.
         ['chromeos==1 or touchui==1', {
           'webui_task_manager%': 1,
         }, {
           'webui_task_manager%': 0,
         }],
 
         # Enable smooth scrolling for Mac, Win, Linux and ChromeOS
         ['OS=="linux" or OS=="mac" or OS=="win"', {
           'enable_smooth_scrolling%': 1,
@@ skipping 79 matching lines @@
     # these defaults.
     'mac_sdk%': '10.5',
     'mac_deployment_target%': '10.5',
 
     # Set to 1 to enable code coverage.  In addition to build changes
     # (e.g. extra CFLAGS), also creates a new target in the src/chrome
     # project file called "coverage".
     # Currently ignored on Windows.
     'coverage%': 0,
 
-    # Overridable specification for potential use of alternative
-    # JavaScript engines.
-    'javascript_engine%': 'v8',
-
     # Although base/allocator lets you select a heap library via an
     # environment variable, the libcmt shim it uses sometimes gets in
     # the way.  To disable it entirely, and switch to normal msvcrt, do e.g.
     #  'win_use_allocator_shim': 0,
     #  'win_release_RuntimeLibrary': 2
     # to ~/.gyp/include.gypi, gclient runhooks --force, and do a release build.
     'win_use_allocator_shim%': 1, # 1 = shim allocator via libcmt; 0 = msvcrt
 
     # Whether usage of OpenMAX is enabled.
     'enable_openmax%': 0,
@@ skipping 1666 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }