Move system.* family of APIs to extensions/

chrome/browser/extensions/api/system_display/display_info_provider.h

-// Copyright 2013 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 CHROME_BROWSER_EXTENSIONS_API_SYSTEM_DISPLAY_DISPLAY_INFO_PROVIDER_H_
-#define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_DISPLAY_DISPLAY_INFO_PROVIDER_H_
-
-#include <string>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/memory/linked_ptr.h"
-
-namespace gfx {
-class Display;
-class Screen;
-}
-
-namespace extensions {
-
-namespace api {
-namespace system_display {
-struct DisplayProperties;
-struct DisplayUnitInfo;
-}
-}
-
-typedef std::vector<linked_ptr<api::system_display::DisplayUnitInfo> >
-    DisplayInfo;
-
-class DisplayInfoProvider {
- public:
-  virtual ~DisplayInfoProvider();
-
-  // Returns a pointer to DisplayInfoProvider or NULL if Create()
-  // or InitializeForTesting() or not called yet.
-  static DisplayInfoProvider* Get();
-
-  // This is for tests that run in its own process (e.g. browser_tests).
-  // Using this in other tests (e.g. unit_tests) will result in DCHECK failure.
-  static void InitializeForTesting(DisplayInfoProvider* display_info_provider);
-
-  // Updates the display with |display_id| according to |info|. Returns whether
-  // the display was successfully updated. On failure, no display parameters
-  // should be changed, and |error| should be set to the error string.
-  virtual bool SetInfo(const std::string& display_id,
-                       const api::system_display::DisplayProperties& info,
-                       std::string* error) = 0;
-
-  // Get the screen that is always active, which will be used for monitoring
-  // display changes events.
-  virtual gfx::Screen* GetActiveScreen() = 0;
-
-  DisplayInfo GetAllDisplaysInfo();
-
- protected:
-  DisplayInfoProvider();
-
- private:
-  static DisplayInfoProvider* Create();
-
-  // Update the content of the |unit| obtained for |display| using
-  // platform specific method.
-  virtual void UpdateDisplayUnitInfoForPlatform(
-      const gfx::Display& display,
-      api::system_display::DisplayUnitInfo* unit) = 0;
-
-  DISALLOW_COPY_AND_ASSIGN(DisplayInfoProvider);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_DISPLAY_DISPLAY_INFO_PROVIDER_H_