Only commit cookie changes in prerenders after a prerender is shown

chrome/android/java/src/org/chromium/chrome/browser/prerender/ExternalPrerenderHandler.java

 // Copyright 2013 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.prerender;
 
 import org.chromium.base.JNINamespace;
 import org.chromium.chrome.browser.ContentViewUtil;
 import org.chromium.chrome.browser.profiles.Profile;
 
@@ skipping 20 matching lines @@
     }
 
     public void cancelCurrentPrerender() {
         nativeCancelCurrentPrerender(mNativeExternalPrerenderHandler);
     }
 
     public static boolean hasPrerenderedUrl(Profile profile, String url, long webContentsPtr)  {
         return nativeHasPrerenderedUrl(profile, url, webContentsPtr);
     }
 
+    public static boolean hasCookieStoreLoaded(Profile profile)  {
+        return nativeHasCookieStoreLoaded(profile);
+    }
+
     private static native long nativeInit();
     private static native boolean nativeAddPrerender(
             long nativeExternalPrerenderHandlerAndroid, Profile profile,
             long webContentsPtr, String url, String referrer, int width, int height);
     private static native boolean nativeHasPrerenderedUrl(
             Profile profile, String url, long webContentsPtr);
+    private static native boolean nativeHasCookieStoreLoaded(
+            Profile profile);
     private static native void nativeCancelCurrentPrerender(
             long nativeExternalPrerenderHandlerAndroid);
 }