Moves android specific code into android directory

shell/android/library_loader.cc

 // Copyright 2013 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 "base/android/base_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 "base/logging.h"
 #include "services/native_viewport/platform_viewport_android.h"
 #include "shell/android/android_handler.h"
 #include "shell/android/mojo_main.h"
 
 namespace {
 
 base::android::RegistrationMethod kMojoRegisteredMethods[] = {
     {"AndroidHandler", mojo::RegisterAndroidHandlerJni},
-    {"MojoMain", mojo::RegisterMojoMain},
+    {"MojoMain", mojo::shell::RegisterMojoMain},
     {"PlatformViewportAndroid",
      native_viewport::PlatformViewportAndroid::Register},
 };
 
 bool RegisterMojoJni(JNIEnv* env) {
   return RegisterNativeMethods(env, kMojoRegisteredMethods,
                                arraysize(kMojoRegisteredMethods));
 }
 
 }  // namespace
 
 // This is called by the VM when the shared library is first loaded.
 JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
   base::android::InitVM(vm);
   JNIEnv* env = base::android::AttachCurrentThread();
 
   if (!base::android::RegisterLibraryLoaderEntryHook(env))
     return -1;
 
   if (!base::android::RegisterJni(env))
     return -1;
 
   if (!RegisterMojoJni(env))
     return -1;
 
   return JNI_VERSION_1_4;
 }