Update prerender policy for custom tabs

chrome/android/java/src/org/chromium/chrome/browser/customtabs/ClientManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/ClientManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/ClientManager.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/ClientManager.java
index 5624ca48b2a96f94ba86fa9042fe5946de87a459..d6e4121c833bd2367da26d1cb6b9ab34aa12e041 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/ClientManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/ClientManager.java
@@ -54,6 +54,7 @@ class ClientManager {
         public final IBinder.DeathRecipient deathRecipient;
         public boolean mIgnoreFragments;
         private boolean mShouldHideDomain;
+        private boolean mShouldPrerenderOnMobile;
         private ServiceConnection mKeepAliveConnection;
         private String mPredictedUrl;
         private long mLastMayLaunchUrlTimestamp;
@@ -273,6 +274,22 @@ class ClientManager {
         params.mIgnoreFragments = value;
     }
 
+    /**
+     * @return Whether prerender should be turned on for mobile networks for given session.
+     */
+    public synchronized boolean shouldPrerenderOnMobileForSession(IBinder session) {
+        SessionParams params = mSessionParams.get(session);
+        return params != null ? params.mShouldPrerenderOnMobile : false;
+    }
+
+    /**
+     * Sets whether prerender should be turned on for mobile networks for given session.
+     */
+    public synchronized void setPrerenderOnMobileForSession(IBinder session, boolean prerender) {
+        SessionParams params = mSessionParams.get(session);
+        if (params != null) params.mShouldPrerenderOnMobile = prerender;

[gone, 2016/03/09 23:02:14]

should setIgnoreFragmentsForSession also check if params != null?

[Yusuf, 2016/03/09 23:22:49]

Done.

+    }
+
     /** Tries to bind to a client to keep it alive, and returns true for success. */
     public synchronized boolean keepAliveForSession(IBinder session, Intent intent) {
         // When an application is bound to a service, its priority is raised to