refactor: rename the atom directory to shell

shell/browser/ui/webui/pdf_viewer_handler.h

@@ -0,0 +1,61 @@
+// Copyright (c) 2017 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_UI_WEBUI_PDF_VIEWER_HANDLER_H_
+#define ATOM_BROWSER_UI_WEBUI_PDF_VIEWER_HANDLER_H_
+
+#include <memory>
+#include <string>
+
+#include "atom/browser/web_contents_zoom_controller.h"
+#include "base/macros.h"
+#include "content/public/browser/host_zoom_map.h"
+#include "content/public/browser/web_ui_message_handler.h"
+
+namespace base {
+class ListValue;
+}
+
+namespace content {
+struct StreamInfo;
+}
+
+namespace atom {
+
+class PdfViewerHandler : public content::WebUIMessageHandler,
+                         public WebContentsZoomController::Observer {
+ public:
+  explicit PdfViewerHandler(const std::string& original_url);
+  ~PdfViewerHandler() override;
+
+  void SetPdfResourceStream(content::StreamInfo* stream);
+
+ protected:
+  // WebUIMessageHandler implementation.
+  void RegisterMessages() override;
+  void OnJavascriptAllowed() override;
+  void OnJavascriptDisallowed() override;
+
+ private:
+  void Initialize(const base::ListValue* args);
+  void GetDefaultZoom(const base::ListValue* args);
+  void GetInitialZoom(const base::ListValue* args);
+  void SetZoom(const base::ListValue* args);
+  void GetStrings(const base::ListValue* args);
+  void Reload(const base::ListValue* args);
+  void OnZoomLevelChanged(content::WebContents* web_contents,
+                          double level,
+                          bool is_temporary);
+  void AddObserver();
+  void RemoveObserver();
+  std::unique_ptr<base::Value> initialize_callback_id_;
+  content::StreamInfo* stream_ = nullptr;
+  std::string original_url_;
+
+  DISALLOW_COPY_AND_ASSIGN(PdfViewerHandler);
+};
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_UI_WEBUI_PDF_VIEWER_HANDLER_H_