Refactor and send voice interaction structure

content/public/browser/web_contents.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 CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <set>
 
 #include "base/callback_forward.h"
 #include "base/files/file_path.h"
 #include "base/process/kill.h"
 #include "base/strings/string16.h"
 #include "base/supports_user_data.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/invalidate_type.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/page_navigator.h"
 #include "content/public/browser/save_page_type.h"
 #include "content/public/browser/screen_orientation_delegate.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/common/stop_find_action.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/accessibility/ax_tree_update.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/scoped_java_ref.h"
 #endif
 
 namespace base {
 class TimeTicks;
@@ skipping 231 matching lines @@
   // Returns the currently active RenderWidgetHostView. This may change over
   // time and can be nullptr (during setup and teardown).
   virtual RenderWidgetHostView* GetRenderWidgetHostView() const = 0;
 
   // Returns the outermost RenderWidgetHostView. This will return the platform
   // specific RenderWidgetHostView (as opposed to
   // RenderWidgetHostViewChildFrame), which can be used to create context
   // menus.
   virtual RenderWidgetHostView* GetTopLevelRenderWidgetHostView() = 0;
 
+  // Request a one-time snapshot of the accessibility tree without changing
+  // the accessibility mode.
+  using AXTreeSnapshotCallback = base::Callback<void(const ui::AXTreeUpdate&)>;
+  virtual void RequestAXTreeSnapshot(AXTreeSnapshotCallback callback) = 0;
+
   // Causes the current page to be closed, including running its onunload event
   // handler.
   virtual void ClosePage() = 0;
 
   // Returns the currently active fullscreen widget. If there is none, returns
   // nullptr.
   virtual RenderWidgetHostView* GetFullscreenRenderWidgetHostView() const = 0;
 
   // Returns the theme color for the underlying content as set by the
   // theme-color meta tag.
@@ skipping 496 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_