Give the layout test harness better information to determine when to finish.

build/common.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.
 
 # 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 602 matching lines @@
       'enable_service_discovery%': 0,
       'enable_wifi_bootstrapping%': 0,
       'enable_hangout_services_extension%': 0,
 
        # Enable the Syzygy optimization step.
       'syzygy_optimize%': 0,
 
       # Enable hole punching for the protected video.
       'video_hole%': 0,
 
+      # Temporary hack to allow us to unify blink's definitions of load
+      # completion. blink uses a crazy set of constraints to determine load
+      # completion, but only actually requires them for layout tests. However,
+      # we need to maintain all the old behaviors while the plumbing is put in
+      # place on both sides of the repo boundary.
+      'enable_load_completion_hacks%': 1,
+
       # Automatically select platforms under ozone. Turn this off to
       # build only explicitly selected platforms.
       'ozone_auto_platforms%': 1,
 
       # If this is set clang is used as host compiler, but not as target
       # compiler. Always do this by default.
       'host_clang%': 1,
 
       'conditions': [
         # A flag for POSIX platforms
@@ skipping 553 matching lines @@
     'data_reduction_proxy_alt_fallback_origin%' : '<(data_reduction_proxy_alt_fallback_origin)',
     'enable_mdns%' : '<(enable_mdns)',
     'enable_service_discovery%' : '<(enable_service_discovery)',
     'enable_wifi_bootstrapping%': '<(enable_wifi_bootstrapping)',
     'enable_hangout_services_extension%' : '<(enable_hangout_services_extension)',
     'v8_optimized_debug%': '<(v8_optimized_debug)',
     'proprietary_codecs%': '<(proprietary_codecs)',
     'use_goma%': '<(use_goma)',
     'gomadir%': '<(gomadir)',
     'video_hole%': '<(video_hole)',
+    'enable_load_completion_hacks%': '<(enable_load_completion_hacks)',
 
     # Whether or not we are building the Athena shell.
     'use_athena%': '0',
 
     # Use system protobuf instead of bundled one.
     'use_system_protobuf%': 0,
 
     # Use system yasm instead of bundled one.
     'use_system_yasm%': 0,
 
@@ skipping 1725 matching lines @@
       }],
       ['enable_hangout_services_extension==1', {
         'defines': ['ENABLE_HANGOUT_SERVICES_EXTENSION=1'],
       }],
       ['enable_ipc_fuzzer==1', {
         'defines': ['ENABLE_IPC_FUZZER=1'],
       }],
       ['video_hole==1', {
         'defines': ['VIDEO_HOLE=1'],
       }],
+      ['enable_load_completion_hacks==1', {
+        'defines': ['ENABLE_LOAD_COMPLETION_HACKS=1'],
+      }],
     ],  # conditions for 'target_defaults'
     'target_conditions': [
       ['<(use_openssl)==1', {
         'defines': ['USE_OPENSSL=1'],
       }],
       ['<(use_openssl_certs)==1', {
         'defines': ['USE_OPENSSL_CERTS=1'],
       }],
       ['>(nacl_untrusted_build)==1', {
         'defines': [
@@ skipping 2811 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',
   },
 }