Fix Incorrect webapp behavior on Kitkat when reusing old WebappActivity.

chrome/android/java/src/org/chromium/chrome/browser/webapps/WebappActivity.java

 // Copyright 2015 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.chrome.browser.webapps;
 
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.Color;
 import android.graphics.drawable.Drawable;
@@ skipping 86 matching lines @@
 
     @Override
     protected void onNewIntent(Intent intent) {
         if (intent == null) return;
         super.onNewIntent(intent);
 
         WebappInfo newWebappInfo = createWebappInfo(intent);
         if (newWebappInfo == null) {
             Log.e(TAG, "Failed to parse new Intent: " + intent);
             ApiCompatibilityUtils.finishAndRemoveTask(this);
-        } else if (!TextUtils.equals(mWebappInfo.id(), newWebappInfo.id())) {
-            mWebappInfo = newWebappInfo;
-            resetSavedInstanceState();
-            if (mIsInitialized) initializeUI(null);
         } else if (newWebappInfo.shouldForceNavigation() && mIsInitialized) {
             getActivityTab().loadUrl(new LoadUrlParams(
                     newWebappInfo.uri().toString(), PageTransition.AUTO_TOPLEVEL));
         }
     }
 
     protected boolean isInitialized() {
         return mIsInitialized;
     }
 
@@ skipping 584 matching lines @@
         return new WebappDelegateFactory(this);
     }
 
     // We're temporarily disable CS on webapp since there are some issues. (http://crbug.com/471950)
     // TODO(changwan): re-enable it once the issues are resolved.
     @Override
     protected boolean isContextualSearchAllowed() {
         return false;
     }
 }