Make class lookup lazy in jni_generator when using lazy method lookup.

base/android/jni_generator/testJarJarRemapping.golden

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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.
 
 // This file is autogenerated by
 //     base/android/jni_generator/jni_generator.py
 // For
 //     org/chromium/example/jni_generator/Example
 
 #ifndef org_chromium_example_jni_generator_Example_JNI
 #define org_chromium_example_jni_generator_Example_JNI
 
 #include <jni.h>
 
 #include "base/android/jni_generator/jni_generator_helper.h"
 
 #include "base/android/jni_int_wrapper.h"
 
 // Step 1: forward declarations.
 namespace {
 const char kExampleClassPath[] = "com/test/jni_generator/Example";
+#if __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-function"
+#endif
 // Leaking this jclass as we cannot use LazyInstance from some threads.
 jclass g_Example_clazz = NULL;
+jclass Example_clazz(JNIEnv*) { return g_Example_clazz; }
+#if __clang__
+#pragma clang diagnostic pop
+#endif
 
 }  // namespace
 
 static void Test(JNIEnv* env, jclass jcaller,
     jobject t);
 
 static void Test2(JNIEnv* env, jclass jcaller,
     jobject t);
 
 static void Test3(JNIEnv* env, jclass jcaller,
@@ skipping 28 matching lines @@
 ")"
 "V", reinterpret_cast<void*>(Test4) },
 };
 
 static bool RegisterNativesImpl(JNIEnv* env) {
   g_Example_clazz = reinterpret_cast<jclass>(env->NewGlobalRef(
       base::android::GetClass(env, kExampleClassPath).obj()));
 
   const int kMethodsExampleSize = arraysize(kMethodsExample);
 
-  if (env->RegisterNatives(g_Example_clazz,
+  if (env->RegisterNatives(Example_clazz(env),
                            kMethodsExample,
                            kMethodsExampleSize) < 0) {
     jni_generator::HandleRegistrationError(
-        env, g_Example_clazz, __FILE__);
+        env, Example_clazz(env), __FILE__);
     return false;
   }
 
   return true;
 }
 
 #endif  // org_chromium_example_jni_generator_Example_JNI