Update prerender policy for custom tabs

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

Index: chrome/android/java/src/org/chromium/chrome/browser/prerender/ExternalPrerenderHandler.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/prerender/ExternalPrerenderHandler.java b/chrome/android/java/src/org/chromium/chrome/browser/prerender/ExternalPrerenderHandler.java
index 00665868353f82f661541644214698fe52f37307..fa94115cd6a15303d3a0fa73696ab0caaea5195d 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/prerender/ExternalPrerenderHandler.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/prerender/ExternalPrerenderHandler.java
@@ -33,13 +33,15 @@ public class ExternalPrerenderHandler {
      * @param referrer The referrer for the prerender request.
      * @param width The width for the content view (render widget host view) for the prerender.
      * @param height The height for the content view (render widget host view) for the prerender.
+     * @param prerenderOnCellular Whether the prerender should happen if the device has a cellular
+     *                            connection.
      * @return The {@link WebContents} that is linked to this prerender. {@code null} if
      *         unsuccessful.
      */
     public WebContents addPrerender(Profile profile, String url, String referrer, int width,
-            int height) {
+            int height, boolean prerenderOnCellular) {
         WebContents webContents = WebContentsFactory.createWebContents(false, false);
-        if (addPrerender(profile, webContents, url, referrer, width, height)) {
+        if (addPrerender(profile, webContents, url, referrer, width, height, prerenderOnCellular)) {
             return webContents;
         }
         if (webContents != null) webContents.destroy();
@@ -56,12 +58,14 @@ public class ExternalPrerenderHandler {
      * @param referrer The referrer for the prerender request.
      * @param width The width for the content view (render widget host view) for the prerender.
      * @param height The height for the content view (render widget host view) for the prerender.
+     * @param prerenderOnCellular Whether the prerender should happen if the device has a cellular
+     *                            connection.
      * @return Whether the prerender was successful.
      */
     public boolean addPrerender(Profile profile, WebContents webContents, String url,
-            String referrer, int width, int height) {
+            String referrer, int width, int height, boolean prerenderOnCellular) {
         return nativeAddPrerender(mNativeExternalPrerenderHandler, profile, webContents,
-                url, referrer, width, height);
+                url, referrer, width, height, prerenderOnCellular);
     }
 
     /**
@@ -101,7 +105,8 @@ public class ExternalPrerenderHandler {
     private static native long nativeInit();
     private static native boolean nativeAddPrerender(
             long nativeExternalPrerenderHandlerAndroid, Profile profile,
-            WebContents webContents, String url, String referrer, int width, int height);
+            WebContents webContents, String url, String referrer,
+            int width, int height, boolean prerenderOnCellular);
     private static native boolean nativeHasPrerenderedUrl(
             Profile profile, String url, WebContents webContents);
     private static native boolean nativeHasPrerenderedAndFinishedLoadingUrl(