[Sync] Add histograms for cookie jar state on Sessions commit

sync/engine/commit.cc

Index: sync/engine/commit.cc
diff --git a/sync/engine/commit.cc b/sync/engine/commit.cc
index 5e3d72e1d96a7c9b0109e4a3898012f0abe7b9c3..678da3f22be727e1f2f214aca46f7ed07669c2bd 100644
--- a/sync/engine/commit.cc
+++ b/sync/engine/commit.cc
@@ -39,6 +39,7 @@ Commit* Commit::Init(
     const std::string& account_name,
     const std::string& cache_guid,
     bool cookie_jar_mismatch,
+    bool cookie_jar_empty,
     CommitProcessor* commit_processor,
     ExtensionsActivity* extensions_activity) {
   // Gather per-type contributions.
@@ -46,6 +47,8 @@ Commit* Commit::Init(
   commit_processor->GatherCommitContributions(
       requested_types,
       max_entries,
+      cookie_jar_mismatch,
+      cookie_jar_empty,
       &contributions);
 
   // Give up if no one had anything to commit.