Do not build device/bluetooth strings when extensions are disabled.

chrome/chrome_resources.gyp

 # 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.
 {
   'variables': {
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
     'about_credits_file': '<(SHARED_INTERMEDIATE_DIR)/about_credits.html',
     'additional_modules_list_file': '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/internal/additional_modules_list.txt',
     'omnibox_mojom_file': '<(SHARED_INTERMEDIATE_DIR)/chrome/browser/ui/webui/omnibox/omnibox.mojom.js',
   },
@@ skipping 425 matching lines @@
         },
         {
           'includes': ['chrome_repack_chrome_200_percent.gypi']
         },
       ],
       'conditions': [
         ['OS != "ios"', {
           'dependencies': [
             '<(DEPTH)/content/app/strings/content_strings.gyp:content_strings',
             '<(DEPTH)/content/content_resources.gyp:content_resources',
-            '<(DEPTH)/device/bluetooth/bluetooth_strings.gyp:device_bluetooth_strings',
-            '<(DEPTH)/extensions/extensions_strings.gyp:extensions_strings',
             '<(DEPTH)/third_party/WebKit/public/blink_resources.gyp:blink_resources',
             '<(DEPTH)/webkit/webkit_resources.gyp:webkit_resources',
           ],
         }],
         ['use_ash==1', {
           'dependencies': [
              '<(DEPTH)/ash/ash_resources.gyp:ash_resources',
              '<(DEPTH)/ash/ash_strings.gyp:ash_strings',
           ],
         }],
         ['chromeos==1', {
           'dependencies': [
             '<(DEPTH)/ui/chromeos/ui_chromeos.gyp:ui_chromeos_resources',
             '<(DEPTH)/ui/chromeos/ui_chromeos.gyp:ui_chromeos_strings',
           ],
         }],
         ['enable_autofill_dialog==1 and OS!="android"', {
           'dependencies': [
             '<(DEPTH)/third_party/libaddressinput/libaddressinput.gyp:libaddressinput_strings',
           ],
         }],
+        ['enable_extensions==1', {
+          'dependencies': [
+            '<(DEPTH)/device/bluetooth/bluetooth_strings.gyp:device_bluetooth_strings',
+            '<(DEPTH)/extensions/extensions_strings.gyp:extensions_strings',
+          ],
+        }],
         ['OS != "mac" and OS != "ios"', {
           # Copy pak files to the product directory. These files will be picked
           # up by the following installer scripts:
           #   - Windows: chrome/installer/mini_installer/chrome.release
           #   - Linux: chrome/installer/linux/internal/common/installer.include
           # Ensure that the above scripts are updated when adding or removing
           # pak files.
           # Copying files to the product directory is not needed on the Mac
           # since the framework build phase will copy them into the framework
           # bundle directly.
@@ skipping 82 matching lines @@
                      '<(generator_path)',
                      'credits',
                      '<(about_credits_file)',
           ],
           'message': 'Generating about:credits',
         },
       ],
     },
   ], # targets
 }