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

base/android/jni_generator/testPureNativeMethodsOption.golden

Index: base/android/jni_generator/testPureNativeMethodsOption.golden
diff --git a/base/android/jni_generator/testPureNativeMethodsOption.golden b/base/android/jni_generator/testPureNativeMethodsOption.golden
index 8d9ee9e26f06aee046a58ce43530cf70ac876153..84efd54bc6fb178c09f66ca319007e699948a443 100644
--- a/base/android/jni_generator/testPureNativeMethodsOption.golden
+++ b/base/android/jni_generator/testPureNativeMethodsOption.golden
@@ -1,4 +1,4 @@
-// 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.
 
@@ -19,8 +19,16 @@
 // Step 1: forward declarations.
 namespace {
 const char kTestClassPath[] = "org/chromium/example/jni_generator/Test";
+#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_Test_clazz = NULL;
+jclass Test_clazz(JNIEnv*) { return g_Test_clazz; }
+#if __clang__
+#pragma clang diagnostic pop
+#endif
 
 }  // namespace
 
@@ -50,11 +58,11 @@ static bool RegisterNativesImpl(JNIEnv* env) {
 
   const int kMethodsTestSize = arraysize(kMethodsTest);
 
-  if (env->RegisterNatives(g_Test_clazz,
+  if (env->RegisterNatives(Test_clazz(env),
                            kMethodsTest,
                            kMethodsTestSize) < 0) {
     jni_generator::HandleRegistrationError(
-        env, g_Test_clazz, __FILE__);
+        env, Test_clazz(env), __FILE__);
     return false;
   }