Revert of Expose distiller functions to JavaScript

components/dom_distiller/content/renderer/distiller_native_javascript.cc

-// Copyright 2015 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 "components/dom_distiller/content/renderer/distiller_native_javascript.h"
-
-#include <string>
-
-#include "base/bind.h"
-#include "base/strings/utf_string_conversions.h"
-#include "components/dom_distiller/content/common/distiller_javascript_service.mojom.h"
-#include "content/public/common/service_registry.h"
-#include "content/public/renderer/render_frame.h"
-#include "gin/arguments.h"
-#include "gin/function_template.h"
-#include "third_party/WebKit/public/web/WebKit.h"
-#include "third_party/WebKit/public/web/WebLocalFrame.h"
-#include "v8/include/v8.h"
-
-using blink::WebLocalFrame;
-
-namespace dom_distiller {
-
-DistillerNativeJavaScript::DistillerNativeJavaScript(
-    content::RenderFrame* render_frame)
-    : render_frame_(render_frame) {}
-
-DistillerNativeJavaScript::~DistillerNativeJavaScript() {}
-
-void DistillerNativeJavaScript::AddJavaScriptObjectToFrame(
-    v8::Local<v8::Context> context) {
-  v8::Isolate* isolate = blink::mainThreadIsolate();
-  v8::HandleScope handle_scope(isolate);
-  if (context.IsEmpty())
-    return;
-
-  v8::Context::Scope context_scope(context);
-
-  v8::Local<v8::Object> distiller_obj =
-      GetOrCreateDistillerObject(isolate, context->Global());
-
-  distiller_obj->Set(
-      gin::StringToSymbol(isolate, "echo"),
-      gin::CreateFunctionTemplate(
-          isolate, base::Bind(&DistillerNativeJavaScript::DistillerEcho,
-                              base::Unretained(this)))
-          ->GetFunction());
-}
-
-std::string DistillerNativeJavaScript::DistillerEcho(
-    const std::string& message) {
-  if (!distiller_js_service_) {
-    render_frame_->GetServiceRegistry()->ConnectToRemoteService(
-        mojo::GetProxy(&distiller_js_service_));
-  }
-  // TODO(mdjones): It is possible and beneficial to have information
-  // returned from the browser process with these calls. The problem
-  // is waiting blocks this process.
-  distiller_js_service_->HandleDistillerEchoCall(message);
-
-  return message;
-}
-
-v8::Local<v8::Object> GetOrCreateDistillerObject(v8::Isolate* isolate,
-                                                 v8::Local<v8::Object> global) {
-  v8::Local<v8::Object> distiller_obj;
-  v8::Local<v8::Value> distiller_value =
-      global->Get(gin::StringToV8(isolate, "distiller"));
-  if (distiller_value.IsEmpty() || !distiller_value->IsObject()) {
-    distiller_obj = v8::Object::New(isolate);
-    global->Set(gin::StringToSymbol(isolate, "distiller"), distiller_obj);
-  } else {
-    distiller_obj = v8::Local<v8::Object>::Cast(distiller_value);
-  }
-  return distiller_obj;
-}
-
-}  // namespace dom_distiller