android: Add a method to let Java know whether a prerender has finished loading.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java
index 5fcec5db02908136a8cb2c31b35643c0db31b090..ee6096da7919791e4fa0a8b0523be4577db0ef1e 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/customtabs/CustomTabsConnection.java
@@ -77,7 +77,8 @@ public class CustomTabsConnection extends ICustomTabsService.Stub {
     private static AtomicReference<CustomTabsConnection> sInstance =
             new AtomicReference<CustomTabsConnection>();
 
-    private static final class PrerenderedUrlParams {
+    @VisibleForTesting
+    static final class PrerenderedUrlParams {
         public final IBinder mSession;
         public final WebContents mWebContents;
         public final String mUrl;
@@ -99,7 +100,8 @@ public class CustomTabsConnection extends ICustomTabsService.Stub {
     private final AtomicBoolean mWarmupHasBeenCalled = new AtomicBoolean();
     private final ClientManager mClientManager;
     private ExternalPrerenderHandler mExternalPrerenderHandler;
-    private PrerenderedUrlParams mPrerender;
+    @VisibleForTesting
+    PrerenderedUrlParams mPrerender;

[gone, 2016/02/22 18:50:15]

Move up a line; I think package protected variables go above private ones

[Benoit L, 2016/02/25 16:03:21]

Done.

     private WebContents mSpareWebContents;
 
     /**