Remove dependency of common on variations browser code

R=asvitkine@chromium.org
BUG=404809,405295

Review URL: https://codereview.chromium.org/490733002

Cr-Commit-Position: refs/heads/master@{#291293}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291293 0039d316-1c4b-4281-b951-d872f2087c98

chrome/chrome_browser.gypi

@@ -2872,6 +2872,7 @@
         # transitively via the common target because the proto sources need to
         # be generated before code in this target can start building.
         '../components/components.gyp:variations',
+        '../components/components.gyp:variations_http_provider',
         '../components/components.gyp:webdata_common',
         '../content/content.gyp:content_browser',
         '../content/content.gyp:content_common',

chrome/chrome_browser_chromeos.gypi

@@ -58,6 +58,7 @@
         # transitively via the common target because the proto sources need to
         # be generated before code in this target can start building.
         '../components/components.gyp:variations',
+        '../components/components.gyp:variations_http_provider',
         '../components/components_strings.gyp:components_strings',
         '../content/content.gyp:content_browser',
         '../content/content.gyp:content_common',

components/components_tests.gyp

@@ -399,6 +399,7 @@
 
             # Dependencies of variations
             'components.gyp:variations',
+            'components.gyp:variations_http_provider',
           ],
           'conditions': [
             ['toolkit_views == 1', {

components/variations.gypi

@@ -12,9 +12,10 @@
         '..',
       ],
       'dependencies': [
+        # List of dependencies is intentionally very minimal. Please avoid
+        # adding extra dependencies without first checking with OWNERS.
         '../base/base.gyp:base',
         '../third_party/mt19937ar/mt19937ar.gyp:mt19937ar',
-        'components.gyp:google_core_browser',
       ],
       'sources': [
         'variations/active_field_trials.cc',
@@ -41,8 +42,6 @@
         '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 +60,23 @@
         }],
       ],
     },
+    {
+      # 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"', {