Add missing using statements for JNI types.

chrome/browser/android/compositor/tab_content_manager.cc

 // Copyright 2014 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/compositor/tab_content_manager.h"
 
 #include <android/bitmap.h>
 #include <stddef.h>
 
 #include <utility>
@@ skipping 14 matching lines @@
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/TabContentManager_jni.h"
 #include "ui/android/resources/ui_resource_provider.h"
 #include "ui/gfx/android/java_bitmap.h"
 #include "ui/gfx/geometry/dip_util.h"
 #include "ui/gfx/geometry/rect.h"
 #include "url/gurl.h"
 
+using base::android::JavaParamRef;
+
 namespace {
 
 const size_t kMaxReadbacks = 1;
 typedef base::Callback<void(float, const SkBitmap&)> TabReadbackCallback;
 
 }  // namespace
 
 namespace chrome {
 namespace android {
 
@@ skipping 297 matching lines @@
            jboolean use_approximation_thumbnail) {
   TabContentManager* manager = new TabContentManager(
       env, obj, default_cache_size, approximation_cache_size,
       compression_queue_max_size, write_queue_max_size,
       use_approximation_thumbnail);
   return reinterpret_cast<intptr_t>(manager);
 }
 
 }  // namespace android
 }  // namespace chrome