Implement <webview>.addContentScript/removeContentScript API [2]

extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher.h

Index: extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher.h
diff --git a/extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher.h b/extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher.h
new file mode 100644
index 0000000000000000000000000000000000000000..8142da8048e55e06e0c9619facb495faafc99ae4
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+++ b/extensions/browser/guest_view/web_view/web_ui/web_ui_url_fetcher.h
@@ -0,0 +1,43 @@
+// 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.
+
+#ifndef EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_UI_URL_FETCHER_H
+#define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_UI_URL_FETCHER_H
+
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_fetcher_delegate.h"
+
+namespace content {
+class BrowserContext;
+}
+
+// WebUIURLFetcher downloads the content of a file by giving its |url| on WebUI.
+// Each WebUIURLFetcher is associated with a given |render_process_id,
+// render_view_id| pair.
+class WebUIURLFetcher : public net::URLFetcherDelegate {
+ public:
+  // Called when a file URL request is complete.
+  // Parameters:
+  // - whether the request is success.
+  // - If yes, the content of the file.
+  using WebUILoadFileCallback = base::Callback<void(bool, const std::string&)>;
+
+  WebUIURLFetcher(content::BrowserContext* context,
+                  const WebUILoadFileCallback& callback);
+  ~WebUIURLFetcher() override;
+
+  void Start(int render_process_id, int render_view_id, const GURL& url);
+
+ private:
+  // net::URLFetcherDelegate:
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
+
+  content::BrowserContext* context_;
+  WebUILoadFileCallback callback_;
+  scoped_ptr<net::URLFetcher> fetcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebUIURLFetcher);
+};
+
+#endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_UI_URL_FETCHER_H