Add JUnit tests for ImeThread activation

content/public/android/java/src/org/chromium/content/browser/input/ThreadedInputConnectionFactory.java

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser.input;
 
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.view.View;
 import android.view.inputmethod.EditorInfo;
@@ skipping 185 matching lines @@
             public void run() {
                 checkRegisterResult(view, checkInvalidator, retry);
             }
         });
     }
 
     private void checkRegisterResult(View view, CheckInvalidator checkInvalidator, int retry) {
         if (DEBUG_LOGS) Log.w(TAG, "checkRegisterResult - retry: " + retry);
         // Success.
         if (mInputMethodManagerWrapper.isActive(mProxyView)) {
-            mInputMethodUma.recordProxyViewSuccess();
+            onRegisterProxyViewSuccess();
             return;
         }
 
         if (checkInvalidator.isInvalid()) return;
 
         if (retry > 0) {
             postCheckRegisterResultOnUiThread(view, checkInvalidator, retry - 1);
             return;
         }
 
-        onRegisterProxyViewFailed();
+        onRegisterProxyViewFailure();
     }
 
     @VisibleForTesting
-    protected void onRegisterProxyViewFailed() {
-        Log.w(TAG, "onRegisterProxyViewFailed");
+    protected void onRegisterProxyViewSuccess() {
+        Log.d(TAG, "onRegisterProxyViewSuccess");
+        mInputMethodUma.recordProxyViewSuccess();
+    }
+
+    @VisibleForTesting
+    protected void onRegisterProxyViewFailure() {
+        Log.w(TAG, "onRegisterProxyViewFailure");
         mInputMethodUma.recordProxyViewFailure();
     }
 
     @Override
     public Handler getHandler() {
         return mHandler;
     }
 
     @Override
     public void onWindowFocusChanged(boolean gainFocus) {
@@ skipping 15 matching lines @@
         if (mProxyView != null) mProxyView.onOriginalViewAttachedToWindow();
     }
 
     @Override
     public void onViewDetachedFromWindow() {
         if (DEBUG_LOGS) Log.d(TAG, "onViewDetachedFromWindow");
         if (mCheckInvalidator != null) mCheckInvalidator.invalidate();
         if (mProxyView != null) mProxyView.onOriginalViewDetachedFromWindow();
     }
 }