[WebView] Flatten lib/main to lib

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/webview_jni_onload.h"
-#include "base/android/jni_android.h"
-#include "base/android/library_loader/library_loader_hooks.h"
-
-// This is called by the VM when the shared library is first loaded.
-// Most of the initialization is done in LibraryLoadedOnMainThread(), not here.
-JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
-  // WebView uses native JNI exports; disable manual JNI registration because
-  // we don't have a good way to detect the JNI registrations which is called,
-  // outside of OnJNIOnLoadRegisterJNI code path.
-  base::android::SetJniRegistrationType(base::android::NO_JNI_REGISTRATION);
-  base::android::InitVM(vm);
-  base::android::SetNativeInitializationHook(&android_webview::OnJNIOnLoadInit);
-  return JNI_VERSION_1_4;
-}