Added a debug info UI for Blimp

blimp/client/app/android/blimp_client_session_android.cc

Index: blimp/client/app/android/blimp_client_session_android.cc
diff --git a/blimp/client/app/android/blimp_client_session_android.cc b/blimp/client/app/android/blimp_client_session_android.cc
index 88044493f3cedd1cd6d89c77757371f059712be6..54002fe727caf5da22f58a92cd6f5c1dc164e1e1 100644
--- a/blimp/client/app/android/blimp_client_session_android.cc
+++ b/blimp/client/app/android/blimp_client_session_android.cc
@@ -113,5 +113,17 @@ void BlimpClientSessionAndroid::OnAssignmentConnectionAttempted(
   BlimpClientSession::OnAssignmentConnectionAttempted(result, assignment);
 }
 
+base::android::ScopedJavaLocalRef<jintArray>
+BlimpClientSessionAndroid::GetDebugInfo(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& jobj) {
+  BlimpConnectionStatistics* stats =
+      BlimpClientSession::GetBlimpConnectionStatistics();
+  int metrics[] = {stats->Get(BlimpConnectionStatistics::BYTES_RECEIVED),
+                   stats->Get(BlimpConnectionStatistics::BYTES_SENT),
+                   stats->Get(BlimpConnectionStatistics::COMMIT)};
+  return base::android::ToJavaIntArray(env, metrics, arraysize(metrics));
+}
+
 }  // namespace client
 }  // namespace blimp