Add mojo service to get notified of vsync.

shell/android/apk/src/org/chromium/mojo/shell/JavaApplicationRegistry.java

Index: shell/android/apk/src/org/chromium/mojo/shell/JavaApplicationRegistry.java
diff --git a/shell/android/apk/src/org/chromium/mojo/shell/JavaApplicationRegistry.java b/shell/android/apk/src/org/chromium/mojo/shell/JavaApplicationRegistry.java
index b0e81db1e71e7574162ad711934e3452a3875e1b..c442f99a741db66b969281347e6458d2c24f3759 100644
--- a/shell/android/apk/src/org/chromium/mojo/shell/JavaApplicationRegistry.java
+++ b/shell/android/apk/src/org/chromium/mojo/shell/JavaApplicationRegistry.java
@@ -4,6 +4,8 @@
 
 package org.chromium.mojo.shell;
 
+import android.os.HandlerThread;
+
 import org.chromium.base.ApplicationStatus;
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
@@ -30,6 +32,7 @@ import java.util.Map;
 @JNINamespace("shell")
 public class JavaApplicationRegistry {
     private final Map<String, ApplicationDelegate> mApplicationDelegateMap = new HashMap<>();
+    private final HandlerThread mHandlerThread = new HandlerThread("FrameworkThread");

[ppi, 2015/11/17 16:40:46]

// Thread with a Looper required for VsyncFactory.

[qsr, 2015/11/17 17:19:41]

Done. But didn't speak about VSyncFactory, as the idea is to be able to reuse
this thread if other cases appear.

 
     private static final class ApplicationRunnable implements Runnable {
         private final ApplicationDelegate mApplicationDelegate;
@@ -51,7 +54,9 @@ public class JavaApplicationRegistry {
         }
     }
 
-    private JavaApplicationRegistry() {}
+    private JavaApplicationRegistry() {
+        mHandlerThread.start();
+    }
 
     private void registerApplicationDelegate(String url, ApplicationDelegate applicationDelegate) {
         mApplicationDelegateMap.put(url, applicationDelegate);
@@ -97,6 +102,9 @@ public class JavaApplicationRegistry {
         registry.registerApplicationDelegate("mojo:sharing", new SharingApplicationDelegate());
         registry.registerApplicationDelegate(
                 "mojo:native_viewport_support", new NativeViewportSupportApplicationDelegate());
+        registry.registerApplicationDelegate(
+                "mojo:vsync", new ServiceProviderFactoryApplicationDelegate(
+                                      new VsyncFactory(registry.mHandlerThread)));
         return registry;
     }