Revert 127833 - Re-land alexbost's experimental offscreenTabs API.

chrome/browser/extensions/api/offscreen_tabs/offscreen_tabs_api.h

-// Copyright (c) 2012 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_OFFSCREEN_TABS_OFFSCREEN_TABS_API_H_
-#define CHROME_BROWSER_EXTENSIONS_API_OFFSCREEN_TABS_OFFSCREEN_TABS_API_H_
-#pragma once
-
-#include <string>
-
-#include "base/values.h"
-#include "chrome/browser/extensions/extension_function.h"
-#include "chrome/browser/extensions/extension_tabs_module.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/web_contents_observer.h"
-
-// The offscreen tabs module depends on the tabs module so we can share
-// code between them. The long-term goal is to fold the offscreen tabs
-// functionality into the tabs API. While these methods seem very similar to
-// those in tabs, there are a few key differences that need to be resolved.
-//  - Offscreen tabs are invisible (maybe this could be a property on Tab).
-//  - The lifetime of an offscreen tab is tied to the parent tab that opened
-//    it. We do this to prevent leaking these tabs, since users wouldn't have
-//    a way of directly closing them or knowing they're open.
-//  - Offscreen tabs have a width and height, while regular tabs don't. This
-//    lets clients control the dimensions of the images in ToDataUrl.
-
-class BackingStore;
-class SkBitmap;
-class TabContentsWrapper;
-namespace content {
-class WebContents;
-}  // namespace content
-
-// Creates an offscreen tab.
-class CreateOffscreenTabFunction : public SyncExtensionFunction {
- public:
-  CreateOffscreenTabFunction();
- private:
-  virtual ~CreateOffscreenTabFunction();
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.create")
-  DISALLOW_COPY_AND_ASSIGN(CreateOffscreenTabFunction);
-};
-
-// Gets info about an offscreen tab.
-class GetOffscreenTabFunction : public SyncExtensionFunction {
- public:
-  GetOffscreenTabFunction();
- private:
-  virtual ~GetOffscreenTabFunction();
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.get")
-  DISALLOW_COPY_AND_ASSIGN(GetOffscreenTabFunction);
-};
-
-// Gets all offscreen tabs created by the tab that invoked this function.
-class GetAllOffscreenTabFunction : public SyncExtensionFunction {
- public:
-  GetAllOffscreenTabFunction();
- private:
-  virtual ~GetAllOffscreenTabFunction();
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.getAll")
-  DISALLOW_COPY_AND_ASSIGN(GetAllOffscreenTabFunction);
-};
-
-// Removes an offscreen tab.
-class RemoveOffscreenTabFunction : public SyncExtensionFunction {
- public:
-  RemoveOffscreenTabFunction();
- private:
-  virtual ~RemoveOffscreenTabFunction();
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.remove")
-  DISALLOW_COPY_AND_ASSIGN(RemoveOffscreenTabFunction);
-};
-
-// Synthesizes a keyboard event based on a passed-in JavaScript keyboard event.
-// TODO(jstritar): This would be useful on the chrome.tabs API.
-class SendKeyboardEventOffscreenTabFunction : public SyncExtensionFunction {
- public:
-  SendKeyboardEventOffscreenTabFunction();
- private:
-  virtual ~SendKeyboardEventOffscreenTabFunction();
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME(
-    "experimental.offscreenTabs.sendKeyboardEvent")
-  DISALLOW_COPY_AND_ASSIGN(SendKeyboardEventOffscreenTabFunction);
-};
-
-// Synthesizes a mouse event based on a passed-in JavaScript mouse event.
-// Since only the application knows where the user clicks, x and y coordinates
-// need to be passed in as well in this case of click, mousedown, and mouseup.
-// TODO(jstritar): This would be useful on the chrome.tabs API.
-class SendMouseEventOffscreenTabFunction : public SyncExtensionFunction {
- public:
-  SendMouseEventOffscreenTabFunction();
- private:
-  virtual ~SendMouseEventOffscreenTabFunction();
-  virtual bool RunImpl() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.sendMouseEvent")
-  DISALLOW_COPY_AND_ASSIGN(SendMouseEventOffscreenTabFunction);
-};
-
-// Gets a snapshot of the offscreen tab and returns it as a data URL.
-class ToDataUrlOffscreenTabFunction : public CaptureVisibleTabFunction {
- public:
-  ToDataUrlOffscreenTabFunction();
- private:
-  virtual ~ToDataUrlOffscreenTabFunction();
-  virtual bool GetTabToCapture(content::WebContents** web_contents,
-                               TabContentsWrapper** wrapper) OVERRIDE;
-  // TODO(jstritar): Rename to toDataUrl.
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.toDataUrl")
-  DISALLOW_COPY_AND_ASSIGN(ToDataUrlOffscreenTabFunction);
-};
-
-// Updates an offscreen tab.
-class UpdateOffscreenTabFunction : public UpdateTabFunction {
- public:
-  UpdateOffscreenTabFunction();
- private:
-  virtual ~UpdateOffscreenTabFunction();
-  virtual bool RunImpl() OVERRIDE;
-  virtual void PopulateResult() OVERRIDE;
-  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.update")
-  DISALLOW_COPY_AND_ASSIGN(UpdateOffscreenTabFunction);
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_API_OFFSCREEN_TABS_OFFSCREEN_TABS_API_H_