Add missing using statements for JNI types.

printing/printing_context_android.cc

 // Copyright 2013 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 "printing/printing_context_android.h"
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "jni/PrintingContext_jni.h"
 #include "printing/metafile.h"
 #include "printing/print_job_constants.h"
 #include "printing/units.h"
 #include "third_party/icu/source/i18n/unicode/ulocdata.h"
 
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+
 namespace {
 
 // 1 inch in mils.
 const int kInchToMil = 1000;
 
 inline int Round(double x) {
   return static_cast<int>(x + 0.5);
 }
 
 // Sets the page sizes for a |PrintSettings| object.  |width| and |height|
@@ skipping 222 matching lines @@
   // Intentional No-op.
   return NULL;
 }
 
 // static
 bool PrintingContextAndroid::RegisterPrintingContext(JNIEnv* env) {
    return RegisterNativesImpl(env);
 }
 
 }  // namespace printing