Remove dependency of common on variations browser code

components/variations.gypi

Index: components/variations.gypi
diff --git a/components/variations.gypi b/components/variations.gypi
index c3589aea4ba12150939c4324d7cb59f6bbdf4d33..30b11a70227f1a0f8284205a9f55e2d07c94c6c4 100644
--- a/components/variations.gypi
+++ b/components/variations.gypi
@@ -2,6 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+# List of dependencies is intentionally very minimal. Please avoid adding extra
+# dependencies without first checking with OWNERS.

[Alexei Svitkine (slow), 2014/08/21 21:36:34]

Nit: I was thinking this can be within the dependencies block itself, so it's
more likely someone trying to change that will see the comment.

[scottmg, 2014/08/21 21:40:38]

Done.

+
 {
   'targets': [
     {
@@ -14,7 +17,6 @@
       'dependencies': [
         '../base/base.gyp:base',
         '../third_party/mt19937ar/mt19937ar.gyp:mt19937ar',
-        'components.gyp:google_core_browser',
       ],
       'sources': [
         'variations/active_field_trials.cc',
@@ -41,8 +43,6 @@
         'variations/study_filtering.h',
         'variations/variations_associated_data.cc',
         'variations/variations_associated_data.h',
-        'variations/variations_http_header_provider.cc',
-        'variations/variations_http_header_provider.h',
         'variations/variations_seed_processor.cc',
         'variations/variations_seed_processor.h',
         'variations/variations_seed_simulator.cc',
@@ -61,6 +61,23 @@
         }],
       ],
     },
+    {
+      # GN version: //components/variations_http_provider
+      'target_name': 'variations_http_provider',
+      'type': 'static_library',
+      'include_dirs': [
+        '..',
+      ],
+      'dependencies': [
+        '../base/base.gyp:base',
+        'components.gyp:google_core_browser',
+        'variations',
+      ],
+      'sources': [
+        'variations/variations_http_header_provider.cc',
+        'variations/variations_http_header_provider.h',
+      ],
+    },
   ],
   'conditions': [
     ['OS=="android"', {