Added a debug info UI for Blimp

blimp/client/app/android/java/src/org/chromium/blimp/session/BlimpClientSession.java

Index: blimp/client/app/android/java/src/org/chromium/blimp/session/BlimpClientSession.java
diff --git a/blimp/client/app/android/java/src/org/chromium/blimp/session/BlimpClientSession.java b/blimp/client/app/android/java/src/org/chromium/blimp/session/BlimpClientSession.java
index d16cbc2703d2178dfc79b1e6ca870fb61721f499..26c3d8e126fd4bd6f0f6f116456c6e269c8485f8 100644
--- a/blimp/client/app/android/java/src/org/chromium/blimp/session/BlimpClientSession.java
+++ b/blimp/client/app/android/java/src/org/chromium/blimp/session/BlimpClientSession.java
@@ -47,6 +47,14 @@ public class BlimpClientSession {
          *               and their explanations.
          */
         void onDisconnected(String reason);
+
+        /**
+         * Called to update the debug UI about network statistics for the current web page.
+         * @param received Number of bytes received.
+         * @param sent Number of bytes sent.
+         * @param commit Number of commits completed.
+         */
+        void updateDebugInfo(int received, int sent, int commit);
     }
 
     private final String mAssignerUrl;
@@ -142,6 +150,12 @@ public class BlimpClientSession {
         }
     }
 
+    public void enableDebugInfo(boolean enable) {
+        if (mNativeBlimpClientSessionAndroidPtr == 0) return;
+
+        nativeEnableDebugInfo(mNativeBlimpClientSessionAndroidPtr, enable);
+    }
+
     @CalledByNative
     void onConnected() {
         for (ConnectionObserver observer : mObservers) {
@@ -162,7 +176,15 @@ public class BlimpClientSession {
         return mNativeBlimpClientSessionAndroidPtr;
     }
 
+    @CalledByNative
+    private void updateDebugInfo(int received, int sent, int commits) {
+        for (ConnectionObserver observer : mObservers) {
+            observer.updateDebugInfo(received, sent, commits);
+        }
+    }
+
     private native long nativeInit(String assignerUrl);
     private native void nativeConnect(long nativeBlimpClientSessionAndroid, String token);
     private native void nativeDestroy(long nativeBlimpClientSessionAndroid);
+    private native void nativeEnableDebugInfo(long nativeBlimpClientSessionAndroid, boolean enable);
 }