This fixes debugging chrome apps from the dart editor.

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 321 matching lines @@
       # Whether one-click signin is enabled or not.
       'enable_one_click_signin%': 0,
 
       # Enable Chrome browser extensions
       'enable_extensions%': 1,
 
       # Enable browser automation.
       'enable_automation%': 1,
 
       # Enable Google Now.
-      'enable_google_now%': 1,
+      'enable_google_now%': 0,
 
       # Enable printing support and UI. This variable is used to configure
       # which parts of printing will be built. 0 disables printing completely,
       # 1 enables it fully, and 2 enables only the codepath to generate a
       # Metafile (e.g. usually a PDF or EMF) and disables print preview, cloud
       # print, UI, etc.
       'enable_printing%': 1,
 
       # Set the version of CLD.
       #   0: Don't specify the version. This option is for the Finch testing.
@@ skipping 4332 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',
   },
 }