Add framework for sending feedback for Blimp.

blimp/client/app/android/javatests/src/org/chromium/blimp/core/MockBlimpClientContext.java

Index: blimp/client/app/android/javatests/src/org/chromium/blimp/core/MockBlimpClientContext.java
diff --git a/blimp/client/app/android/javatests/src/org/chromium/blimp/core/MockBlimpClientContext.java b/blimp/client/app/android/javatests/src/org/chromium/blimp/core/MockBlimpClientContext.java
index 744a9d4dc624b15ec1fda7f6fc3b01bc96a40ff8..86e46c89a6ae737bddb83a5dd740ebc026af57ce 100644
--- a/blimp/client/app/android/javatests/src/org/chromium/blimp/core/MockBlimpClientContext.java
+++ b/blimp/client/app/android/javatests/src/org/chromium/blimp/core/MockBlimpClientContext.java
@@ -13,6 +13,9 @@ import org.chromium.blimp_public.BlimpClientContextDelegate;
 import org.chromium.blimp_public.contents.BlimpContents;
 import org.chromium.ui.base.WindowAndroid;
 
+import java.util.HashMap;
+import java.util.Map;
+
 /**
  * Mock {@link BlimpClientContext}.
  * This test support class only tests Java layer and is not backed by any native code.
@@ -70,4 +73,9 @@ public class MockBlimpClientContext implements BlimpClientContext, BlimpPreferen
 
     @Override
     public void initSettingsPage(AboutBlimpPreferences preferences) {}
+
+    @Override
+    public Map<String, String> getFeedbackMap() {
+        return new HashMap<>();
+    }
 }