Re-land: Implement NativeViewAccessibilityWin using AXPlatformNodeWin.

ui/accessibility/platform/test_ax_node_wrapper.h

+// Copyright 2015 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_PLATFORM_TEST_AX_NODE_WRAPPER_H_
+#define UI_ACCESSIBILITY_PLATFORM_TEST_AX_NODE_WRAPPER_H_
+
+#include "ui/accessibility/ax_node.h"
+#include "ui/accessibility/ax_tree.h"
+#include "ui/accessibility/platform/ax_platform_node.h"
+#include "ui/accessibility/platform/ax_platform_node_delegate.h"
+
+namespace ui {
+
+// For testing, a TestAXNodeWrapper wraps an AXNode, implements
+// AXPlatformNodeDelegate, and owns an AXPlatformNode.
+class TestAXNodeWrapper : public AXPlatformNodeDelegate {
+ public:
+  // Create TestAXNodeWrapper instances on-demand from an AXTree and AXNode.
+  // Note that this sets the AXTreeDelegate, you can't use this class if
+  // you also want to implement AXTreeDelegate.
+  static TestAXNodeWrapper* GetOrCreate(AXTree* tree, AXNode* node);
+
+  // Set a global coordinate offset for testing.
+  static void SetGlobalCoordinateOffset(const gfx::Vector2d& offset);
+
+  virtual ~TestAXNodeWrapper();
+
+  AXPlatformNode* ax_platform_node() { return platform_node_; }
+
+  // AXPlatformNodeDelegate.
+  const AXNodeData* GetData() override;
+  gfx::NativeViewAccessible GetParent() override;
+  int GetChildCount() override;
+  gfx::NativeViewAccessible ChildAtIndex(int index) override;
+  int GetIndexInParent() override;
+  gfx::Vector2d GetGlobalCoordinateOffset() override;
+  gfx::NativeViewAccessible HitTestSync(int x, int y) override;
+  gfx::NativeViewAccessible GetFocus() override;
+  gfx::AcceleratedWidget GetTargetForNativeAccessibilityEvent() override;
+  void DoDefaultAction() override;
+  bool SetStringValue(const base::string16& new_value) override;
+
+ private:
+  TestAXNodeWrapper(AXTree* tree, AXNode* node);
+
+  AXTree* tree_;
+  AXNode* node_;
+  AXPlatformNode* platform_node_;
+};
+
+}  // namespace ui
+
+#endif  // UI_ACCESSIBILITY_PLATFORM_TEST_AX_NODE_WRAPPER_H_