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

android_webview/lib/main/webview_entry_point.cc

 // 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.
 
 #include "android_webview/lib/main/aw_main_delegate.h"
 #include "android_webview/native/android_webview_jni_registrar.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/android/library_loader/library_loader_hooks.h"
 #include "components/navigation_interception/component_jni_registrar.h"
@@ skipping 29 matching lines @@
   // Register JNI for components we depend on.
   if (!RegisterNativeMethods(
       env,
       kWebViewDependencyRegisteredMethods,
       arraysize(kWebViewDependencyRegisteredMethods)))
     return -1;
 
   if (!android_webview::RegisterJni(env))
     return -1;
 
+  base::android::InitFallbackClassLoader(env);
+
   content::SetContentMainDelegate(new android_webview::AwMainDelegate());
 
   // Initialize url lib here while we are still single-threaded, in case we use
   // CookieManager before initializing Chromium (which would normally have done
   // this). It's safe to call this multiple times.
   url::Initialize();
 
   return JNI_VERSION_1_4;
 }