DevTools: merge devtools_http_handler into content - it is used in all the embedders anyways.

chromecast/browser/devtools/cast_dev_tools_delegate.h

-// 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.
-
-#ifndef CHROMECAST_BROWSER_DEVTOOLS_CAST_DEV_TOOLS_DELEGATE_H_
-#define CHROMECAST_BROWSER_DEVTOOLS_CAST_DEV_TOOLS_DELEGATE_H_
-
-#include "base/macros.h"
-#include "components/devtools_http_handler/devtools_http_handler_delegate.h"
-
-namespace chromecast {
-namespace shell {
-
-class CastDevToolsDelegate :
-    public devtools_http_handler::DevToolsHttpHandlerDelegate {
- public:
-  CastDevToolsDelegate();
-  ~CastDevToolsDelegate() override;
-
-  // devtools_http_handler::DevToolsHttpHandlerDelegate implementation.
-  std::string GetDiscoveryPageHTML() override;
-  std::string GetFrontendResource(const std::string& path) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CastDevToolsDelegate);
-};
-
-}  // namespace shell
-}  // namespace chromecast
-
-#endif  // CHROMECAST_BROWSER_DEVTOOLS_CAST_DEV_TOOLS_DELEGATE_H_