Expose the CLD data source in chrome://translate-internals

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 453 matching lines @@
 
       # The data acquisition mode for CLD2. Possible values are:
       #   static:     CLD2 data is statically linked to the executable.
       #   standalone: CLD2 data is provided in a standalone file that is
       #               bundled with the executable.
       #   component:  CLD2 data is provided as a Chrome "component" and is
       #               downloaded via the component updater.
       #
       # For more information on switching the CLD2 data source, see:
       #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/compact-language-detector-cld-data-source-configuration
+      #
+      # This string will be exposed in chrome://translate-internals under the
+      # heading "CLD Data Source". This allows easy determination of which
+      # data source the browser was built with.
       'cld2_data_source%': 'static',
 
       # Enable spell checker.
       'enable_spellcheck%': 1,
 
       # Webrtc compilation is enabled by default. Set to 0 to disable.
       'enable_webrtc%': 1,
 
       # Enables use of the session service, which is enabled by default.
       # Support for disabling depends on the platform.
@@ skipping 2259 matching lines @@
       }],
       ['enable_background==1', {
         'defines': ['ENABLE_BACKGROUND=1'],
       }],
       ['enable_google_now==1', {
         'defines': ['ENABLE_GOOGLE_NOW=1'],
       }],
       ['cld_version!=0', {
         'defines': ['CLD_VERSION=<(cld_version)'],
       }],
+      ['cld_version==2', {
+        # This is used to populate the "CLD Data Source" field in:
+        # chrome://translate-internals
+        'defines': ['CLD2_DATA_SOURCE=<(cld2_data_source)'],
+      }],
       ['cld2_data_source=="static"', {
         'defines': ['CLD_DATA_FROM_STATIC'],
       }, {
         # CLD2 headers use this #define to control the visibility of dynamic
         # mode functions. We use these functions, so we must define here for
         # our #includes to work right.
         'defines': ['CLD2_DYNAMIC_MODE'],
       }],
       ['cld2_data_source=="standalone"', {
         'defines': ['CLD_DATA_FROM_STANDALONE'],
@@ skipping 2853 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',
   },
 }