Implemented clearing Java prefs after pulling variations first run seed from Java to C++ side

components/variations/android/variations_seed_bridge.cc

Index: components/variations/android/variations_seed_bridge.cc
diff --git a/components/variations/android/variations_seed_bridge.cc b/components/variations/android/variations_seed_bridge.cc
index cf5cbe41db3ac65ff1fe91a503f42eb94c976575..f6049c3fdad59629522b57a3b6c0a12c3ab35e14 100644
--- a/components/variations/android/variations_seed_bridge.cc
+++ b/components/variations/android/variations_seed_bridge.cc
@@ -55,5 +55,11 @@ void GetVariationsFirstRunSeed(std::string* seed_data,
   *seed_country = ConvertJavaStringToUTF8(j_seed_country);
 }
 
+void ClearJavaPrefs() {

[Alexei Svitkine (slow), 2015/11/12 16:30:11]

Nit: ClearJavaFirstRunPrefs().

[Alexander Agulenko, 2015/11/12 17:40:25]

Done.

+  JNIEnv* env = AttachCurrentThread();
+  Java_VariationsSeedBridge_clearVariationsFirstRunSeedPrefs(

[Alexei Svitkine (slow), 2015/11/12 16:30:11]

In this case, since it's on VariationsSeedBridge, you probably can make the
method name shorter.

e.g. clearFirstRunPrefs()

[Alexander Agulenko, 2015/11/12 17:40:25]

Done.

+      env, GetApplicationContext());
+}
+
 }  // namespace android
 }  // namespace variations