Reland: 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 8e65a08a8a1d097620d1561e80041b9fccea141a..1c4b44c3600bea54b1569a0fbf138b2d55dde575 100644
--- a/blimp/client/app/android/blimp_client_session_android.cc
+++ b/blimp/client/app/android/blimp_client_session_android.cc
@@ -114,5 +114,17 @@ 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)};

[Wez, 2016/06/07 00:30:12]

As noted in the implementation, you're creating three separate histogram
snapshots to query from - IIUC all you actually want to do is have
GetBlimpConnectionStatistics() return a snapshot that you can query instead.

+  return base::android::ToJavaIntArray(env, metrics, arraysize(metrics));
+}
+
 }  // namespace client
 }  // namespace blimp