Add build_webkit_exes_from_webkit_gyp flag to build/common.gypi

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 596 matching lines @@
     # is stored in resources.pak. It is still possible to load JS files
     # from disk by passing --debug-devtools cmdline switch.
     'debug_devtools%': 0,
 
     # Point to ICU directory.
     'icu_src_dir': '../third_party/icu',
 
     # The Java Bridge is not compiled in by default.
     'java_bridge%': 0,
 
+    # TODO(dpranke): This determines whether we should attempt to build DRT
+    # et al. from WebKit/Source/WebKit.gyp or Tools/Tools.gyp. This
+    # flag should only be needed temporarily. See
+    # https://bugs.webkit.org/show_bug.cgi?id=68463.
+    'build_webkit_exes_from_webkit_gyp%': 1,
+
     'conditions': [
       # Used to disable Native Client at compile time, for platforms where it
       # isn't supported (ARM)
       ['target_arch=="arm"', {
         'disable_nacl%': 1,
        }, {
         'disable_nacl%': 0,
       }],
       ['os_posix==1 and OS!="mac" and OS!="android"', {
         # This will set gcc_version to XY if you are running gcc X.Y.*.
@@ skipping 1995 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',
   },
 }