Variations seed is pulled from the Java application on the first launch of Chrome

components/variations/variations_seed_store.h

Index: components/variations/variations_seed_store.h
diff --git a/components/variations/variations_seed_store.h b/components/variations/variations_seed_store.h
index cc743d88cd29fdb5caa17e71b38d414d046fec49..e3ceeea170c664eb82d8b084812cb7569fb3a633 100644
--- a/components/variations/variations_seed_store.h
+++ b/components/variations/variations_seed_store.h
@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/time/time.h"
@@ -75,6 +76,13 @@ class VariationsSeedStore {
   // Registers Local State prefs used by this class.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
+#if defined(OS_ANDROID)
+  void SetPullVariationsSeedCallback(
+      const base::Callback<std::string(const std::string&)>& callback) {
+    pull_variations_seed_pref_ = callback;
+  }
+#endif  // OS_ANDROID
+
  protected:
   // Note: UMA histogram enum - don't re-order or remove entries.
   enum VerifySignatureResult {
@@ -134,6 +142,8 @@ class VariationsSeedStore {
   // Keeps track of an invalid signature.
   std::string invalid_base64_signature_;
 
+  base::Callback<std::string(const std::string&)> pull_variations_seed_pref_;
+
   DISALLOW_COPY_AND_ASSIGN(VariationsSeedStore);
 };