Android Allows nested namespace in @JNINamespace annotation.

base/android/jni_generator/golden_sample_for_tests_jni.h

 // Copyright (c) 2012 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.
 
 // This file is autogenerated by
 //     base/android/jni_generator/jni_generator_tests.py
 // For
 //     org/chromium/example/jni_generator/SampleForTests
 
 #ifndef org_chromium_example_jni_generator_SampleForTests_JNI
@@ skipping 13 matching lines @@
 const char kInnerClassClassPath[] =
     "org/chromium/example/jni_generator/SampleForTests$InnerClass";
 const char kSampleForTestsClassPath[] =
     "org/chromium/example/jni_generator/SampleForTests";
 // Leaking this jclass as we cannot use LazyInstance from some threads.
 jclass g_InnerClass_clazz = NULL;
 // Leaking this jclass as we cannot use LazyInstance from some threads.
 jclass g_SampleForTests_clazz = NULL;
 }  // namespace
 
-namespace content {
+namespace base {
+namespace android {
 
 static jint Init(JNIEnv* env, jobject obj);
 
 static jdouble GetDoubleFunction(JNIEnv* env, jobject obj);
 
 static jfloat GetFloatFunction(JNIEnv* env, jclass clazz);
 
 static void SetNonPODDatatype(JNIEnv* env, jobject obj,
     jobject rect);
 
@@ skipping 234 matching lines @@
 
   if (env->RegisterNatives(g_SampleForTests_clazz,
                            kMethodsSampleForTests,
                            kMethodsSampleForTestsSize) < 0) {
     LOG(ERROR) << "RegisterNatives failed in " << __FILE__;
     return false;
   }
 
   return true;
 }
-}  // namespace content
+}  // namespace android
+}  // namespace base
 
 #endif  // org_chromium_example_jni_generator_SampleForTests_JNI