Remove mojo/apps/js, it is unused

mojo/apps/js/content_handler_impl.cc

-// 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.
-
-#include "mojo/apps/js/content_handler_impl.h"
-
-#include "mojo/apps/js/application_delegate_impl.h"
-#include "mojo/apps/js/js_app.h"
-#include "mojo/common/data_pipe_utils.h"
-
-namespace mojo {
-namespace apps {
-
-class ContentHandlerJSApp : public JSApp {
- public:
-  ContentHandlerJSApp(ApplicationDelegateImpl* app_delegate_impl,
-                      URLResponsePtr content)
-      : JSApp(app_delegate_impl),
-        content_(content.Pass()) {
-  }
-
-  bool Load(std::string* source, std::string* file_name) override {
-    *file_name = content_->url;
-    if (content_.is_null())
-      return false;
-    return common::BlockingCopyToString(content_->body.Pass(), source);
-  }
-
- private:
-  URLResponsePtr content_;
-};
-
-
-ContentHandlerImpl::ContentHandlerImpl(ApplicationDelegateImpl* app)
-    : app_delegate_impl_(app) {
-}
-
-ContentHandlerImpl::~ContentHandlerImpl() {
-}
-
-void ContentHandlerImpl::OnConnect(
-    const mojo::String& requestor_url,
-    URLResponsePtr content,
-    InterfaceRequest<ServiceProvider> service_provider) {
-  scoped_ptr<JSApp> js_app(
-      new ContentHandlerJSApp(app_delegate_impl_, content.Pass()));
-  app_delegate_impl_->StartJSApp(js_app.Pass());
-}
-
-}  // namespace apps
-}  // namespace mojo