Android: Replace webrtc_jni namespace with nested jni namespace

webrtc/examples/unityplugin/classreferenceholder.cc

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #include "webrtc/examples/unityplugin/classreferenceholder.h"
@@ skipping 18 matching lines @@
  private:
   std::map<std::string, jclass> classes_;
 };
 
 // Allocated in LoadGlobalClassReferenceHolder(),
 // freed in FreeGlobalClassReferenceHolder().
 static ClassReferenceHolder* g_class_reference_holder = nullptr;
 
 void LoadGlobalClassReferenceHolder() {
   RTC_CHECK(g_class_reference_holder == nullptr);
-  g_class_reference_holder = new ClassReferenceHolder(webrtc_jni::GetEnv());
+  g_class_reference_holder = new ClassReferenceHolder(webrtc::jni::GetEnv());
 }
 
 void FreeGlobalClassReferenceHolder() {
   g_class_reference_holder->FreeReferences(
-      webrtc_jni::AttachCurrentThreadIfNeeded());
+      webrtc::jni::AttachCurrentThreadIfNeeded());
   delete g_class_reference_holder;
   g_class_reference_holder = nullptr;
 }
 
 ClassReferenceHolder::ClassReferenceHolder(JNIEnv* jni) {
   LoadClass(jni, "org/webrtc/UnityUtility");
 }
 
 ClassReferenceHolder::~ClassReferenceHolder() {
   RTC_CHECK(classes_.empty()) << "Must call FreeReferences() before dtor!";
@@ skipping 24 matching lines @@
   RTC_CHECK(inserted) << "Duplicate class name: " << name;
 }
 
 // Returns a global reference guaranteed to be valid for the lifetime of the
 // process.
 jclass FindClass(JNIEnv* jni, const char* name) {
   return g_class_reference_holder->GetClass(name);
 }
 
 }  // namespace unity_plugin