Extend AXTreeSourceViews to handle aura::Window and views::Widget.

ui/views/accessibility/ax_obj_cache.h

Index: ui/views/accessibility/ax_obj_cache.h
diff --git a/ui/views/accessibility/ax_obj_cache.h b/ui/views/accessibility/ax_obj_cache.h
new file mode 100644
index 0000000000000000000000000000000000000000..5198f86d5f949521c5502f61d39d3a3bee7a5955
--- /dev/null
+++ b/ui/views/accessibility/ax_obj_cache.h
@@ -0,0 +1,57 @@
+// Copyright 2014 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_VIEWS_ACCESSIBILITY_AX_OBJ_CACHE_H_
+#define UI_VIEWS_ACCESSIBILITY_AX_OBJ_CACHE_H_
+
+#include <map>
+
+#include "base/basictypes.h"
+
+template <typename T> struct DefaultSingletonTraits;
+
+namespace aura {
+class Window;
+}  // namespace aura
+
+namespace views {
+
+class AXNodeSourceObjWrapper;
+class View;
+class Widget;
+
+class AXObjCache {

[dmazzoni, 2014/04/23 05:06:44]

Then this could be AXAuraObjCache, which is good because AXObjCache sounds too
similar to AXObjectCache in blink.

[David Tseng, 2014/04/23 18:20:01]

There was a point where I would have liked to share the caching logic contained
in AXObjectCache since AXObjCache is heavily inspired by AXObjectCache, but yes,
the naming is probably too similar.

+ public:
+  // Get the single instance of this class.
+  static AXObjCache* GetInstance();
+
+  AXNodeSourceObjWrapper* GetOrCreate(View* view);
+  AXNodeSourceObjWrapper* GetOrCreate(Widget* widget);
+  AXNodeSourceObjWrapper* GetOrCreate(aura::Window* window);
+
+uint32 GetID(View* view);
+uint32 GetID(Widget* widget);
+uint32 GetID(aura::Window* window);
+
+ private:
+  friend struct DefaultSingletonTraits<AXObjCache>;
+
+  AXObjCache() : current_id_(0) {}
+virtual ~AXObjCache() {}
+
+  AXNodeSourceObjWrapper* Get(uint32 id);
+
+  std::map<views::View*, uint32> view_to_id_map_;
+  std::map<views::Widget*, uint32> widget_to_id_map_;
+  std::map<aura::Window*, uint32> window_to_id_map_;
+
+  std::map<uint32, AXNodeSourceObjWrapper*> cache_;
+  uint32 current_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(AXObjCache);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_ACCESSIBILITY_AX_OBJ_CACHE_H_