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..42a6a59c516804d67986f5bda8454fbeffa44ab8 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"
@@ -20,6 +21,9 @@ class VariationsSeed;
 
 namespace variations {
 
+typedef base::Callback<void(std::string*, std::string*, std::string*)>
+    VariationsFirstRunSeedCallback;
+
 // VariationsSeedStore is a helper class for reading and writing the variations
 // seed from Local State.
 class VariationsSeedStore {
@@ -75,6 +79,13 @@ class VariationsSeedStore {
   // Registers Local State prefs used by this class.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
+  // Registers callback for pulling variations first run seed from Java side
+  // in Chrome for Android.
+  void SetVariationsFirstRunSeedCallback(
+      const VariationsFirstRunSeedCallback& callback) {
+    get_variations_first_run_seed_ = callback;
+  }
+
  protected:
   // Note: UMA histogram enum - don't re-order or remove entries.
   enum VerifySignatureResult {
@@ -103,6 +114,12 @@ class VariationsSeedStore {
   // Clears all prefs related to variations seed storage.
   void ClearPrefs();
 
+#if defined(OS_ANDROID)
+  // Imports the variations seed data from Java side during the first
+  // Chrome for Android run.
+  void ImportFirstRunJavaSeed();
+#endif  // OS_ANDROID
+
   // Reads the variations seed data from prefs; returns true on success.
   bool ReadSeedData(std::string* seed_data);
 
@@ -134,6 +151,8 @@ class VariationsSeedStore {
   // Keeps track of an invalid signature.
   std::string invalid_base64_signature_;
 
+  VariationsFirstRunSeedCallback get_variations_first_run_seed_;
+
   DISALLOW_COPY_AND_ASSIGN(VariationsSeedStore);
 };