Fix build issues in base/ for Android x64

base/android/java_handler_thread.cc

Index: base/android/java_handler_thread.cc
diff --git a/base/android/java_handler_thread.cc b/base/android/java_handler_thread.cc
index ce5d0fe97559f15923f9a1852f79b85994e722d7..18e1440ee5cdfc33429ae5515be88164d55de3ec 100644
--- a/base/android/java_handler_thread.cc
+++ b/base/android/java_handler_thread.cc
@@ -46,7 +46,8 @@ void JavaHandlerThread::Start() {
 void JavaHandlerThread::Stop() {
 }
 
-void JavaHandlerThread::InitializeThread(JNIEnv* env, jobject obj, jint event) {
+void JavaHandlerThread::InitializeThread(JNIEnv* env, jobject obj,
+                                         jlong event) {
   // TYPE_JAVA to get the Android java style message loop.
   message_loop_.reset(new base::MessageLoop(base::MessageLoop::TYPE_JAVA));
   static_cast<MessageLoopForUI*>(message_loop_.get())->Start();