Revert of New build flag system, convert Google Now flag

chrome/chrome_common.gypi

Index: chrome/chrome_common.gypi
diff --git a/chrome/chrome_common.gypi b/chrome/chrome_common.gypi
index 73de6dfb137c5f2612e9f4b24f205bb0fab4d236..1438853011749075ed4d8a868d679e0e24d4b0b0 100644
--- a/chrome/chrome_common.gypi
+++ b/chrome/chrome_common.gypi
@@ -314,7 +314,6 @@
         # TODO(gregoryd): chrome_resources and chrome_strings could be
         #  shared with the 64-bit target, but it does not work due to a gyp
         # issue.
-        'chrome_common_features',
         'installer_util',
         'safe_browsing_proto',
         '<(DEPTH)/base/base.gyp:base',
@@ -565,7 +564,6 @@
         'common/net/x509_certificate_model_openssl.cc',
       ],
       'dependencies': [
-        'chrome_common_features',
         '<(DEPTH)/base/base.gyp:base',
         '<(DEPTH)/chrome/chrome_resources.gyp:chrome_resources',
         '<(DEPTH)/chrome/chrome_resources.gyp:chrome_strings',
@@ -655,16 +653,5 @@
         '../third_party/mojo/mojo_public.gyp:mojo_cpp_bindings',
       ],
     },
-    {
-      # GN version: //chrome/common:features
-      'target_name': 'chrome_common_features',
-      'includes': [ '../build/buildflag_header.gypi' ],
-      'variables': {
-        'buildflag_header_path': 'chrome/common/features.h',
-        'buildflag_flags': [
-          'ENABLE_GOOGLE_NOW=<(enable_google_now)',
-        ],
-      },
-    },
   ],
 }