Re-land: Create AXAction and AXActionData as a way to simplify accessibility actions

ui/accessibility/ax_action_data.h

Index: ui/accessibility/ax_action_data.h
diff --git a/ui/accessibility/ax_action_data.h b/ui/accessibility/ax_action_data.h
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index 0000000000000000000000000000000000000000..4c0af535749aac9163dd87fc87832cba42cf9dc7
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+++ b/ui/accessibility/ax_action_data.h
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+// Copyright 2016 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 UI_ACCESSIBILITY_AX_ACTION_DATA_H_
+#define UI_ACCESSIBILITY_AX_ACTION_DATA_H_
+
+#include "base/strings/string16.h"
+#include "ui/accessibility/ax_enums.h"
+#include "ui/accessibility/ax_export.h"
+#include "ui/gfx/geometry/rect.h"
+
+namespace ui {
+
+// A compact representation of an accessibility action and the arguments
+// associated with that action.
+struct AX_EXPORT AXActionData {
+  AXActionData();
+  AXActionData(const AXActionData& other);
+  virtual ~AXActionData();
+
+  // Return a string representation of this data, for debugging.
+  virtual std::string ToString() const;
+
+  // This is a simple serializable struct. All member variables should be
+  // public and copyable.
+
+  // See the AXAction enums in ax_enums.idl for explanations of which
+  // parameters apply.
+
+  // The action to take.
+  AXAction action;
+
+  // The ID of the node that this action should be performed on.
+  int target_node_id;
+
+  // Use enums from AXActionFlags
+  int flags;
+
+  // For an action that creates a selection, the selection anchor and focus
+  // (see ax_tree_data.h for definitions).
+  int anchor_node_id;
+  int anchor_offset;
+
+  int focus_node_id;
+  int focus_offset;
+
+  // The target rect for the action.
+  gfx::Rect target_rect;
+
+  // The target point for the action.
+  gfx::Point target_point;
+
+  // The new value for a node, for the SET_VALUE action.
+  base::string16 value;
+};
+
+}  // namespace ui
+
+#endif  // UI_ACCESSIBILITY_AX_ACTION_DATA_H_