Add missing using statements for JNI types.

chrome/browser/android/java_exception_reporter.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/android/java_exception_reporter.h"
 
 #include "base/android/build_info.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/debug/dump_without_crashing.h"
 #include "jni/JavaExceptionReporter_jni.h"
 
+using base::android::JavaParamRef;
+
 namespace chrome {
 namespace android {
 
 void InitJavaExceptionReporter() {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_JavaExceptionReporter_installHandler(env);
 }
 
 void ReportJavaException(JNIEnv* env,
                          const JavaParamRef<jclass>& jcaller,
@@ skipping 16 matching lines @@
 
 bool RegisterJavaExceptionReporterJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 
 }  // namespace android
 }  // namespace chrome