Add basic support for accessibility hit testing within web contents....

chrome/browser/accessibility/browser_accessibility.h

Index: chrome/browser/accessibility/browser_accessibility.h
===================================================================
--- chrome/browser/accessibility/browser_accessibility.h	(revision 62773)
+++ chrome/browser/accessibility/browser_accessibility.h	(working copy)
@@ -90,6 +90,26 @@
       const BrowserAccessibility* old_acc,
       BrowserAccessibility* new_acc);
 
+  // Returns the bounds of this object in screen coordinates.
+  gfx::Rect GetBoundsRect();
+
+  // Returns the deepest descendant that contains the specified point.
+  BrowserAccessibility* BrowserAccessibilityForPoint(const gfx::Point& point);
+
+  // Return true if this attribute is in the attributes map.
+  bool HasAttribute(WebAccessibility::Attribute attribute);

[dmazzoni, 2010/11/03 02:21:53]

Should the Attribute methods maybe be protected instead of public?

[Chris Guillory, 2010/11/03 17:17:51]

Done.

+
+  // Retrieve the string value of an attribute from the attribute map and
+  // returns true if found.
+  bool GetAttribute(WebAccessibility::Attribute attribute, string16* value);
+
+  // Retrieve the value of an attribute from the attribute map and
+  // if found and nonempty, try to convert it to an integer.
+  // Returns true only if both the attribute was found and it was successfully
+  // converted to an integer.
+  bool GetAttributeAsInt(
+      WebAccessibility::Attribute attribute, int* value_int);
+
   // Accessors
   int32 child_id() const { return child_id_; }
   const std::vector<BrowserAccessibility*>& children() const {