Support accessible inline text boxes.

content/common/accessibility_node_data.h

Index: content/common/accessibility_node_data.h
diff --git a/content/common/accessibility_node_data.h b/content/common/accessibility_node_data.h
index 34e93479c6a6891cc89d114719591790f5ca3907..c0c07662b20dc952f9fb0ea15786636e50a5ec1c 100644
--- a/content/common/accessibility_node_data.h
+++ b/content/common/accessibility_node_data.h
@@ -88,7 +88,10 @@ struct CONTENT_EXPORT AccessibilityNodeData {
     // Color value for WebKit::WebAXRoleColorWell, each component is 0..255
     ATTR_COLOR_VALUE_RED,
     ATTR_COLOR_VALUE_GREEN,
-    ATTR_COLOR_VALUE_BLUE
+    ATTR_COLOR_VALUE_BLUE,
+
+    // Inline text attributes.
+    ATTR_TEXT_DIRECTION
   };
 
   enum FloatAttribute {
@@ -145,7 +148,20 @@ struct CONTENT_EXPORT AccessibilityNodeData {
 
     // For a table, the unique cell ids in row-major order of their first
     // occurrence.
-    ATTR_UNIQUE_CELL_IDS
+    ATTR_UNIQUE_CELL_IDS,
+
+    // For inline text. This is the pixel position of the end of this
+    // character within the bounding rectangle of this object, in the
+    // direction given by ATTR_TEXT_DIRECTION. For example, for left-to-right
+    // text, the first offset is the right coordinate of the first character
+    // within the object's bounds, the second offset is the right coordinate
+    // of the second character, and so on.
+    ATTR_CHARACTER_OFFSETS,
+
+    // For inline text. These int lists must be the same size; they represent
+    // the start and end character index of each word within this text.
+    ATTR_WORD_STARTS,
+    ATTR_WORD_ENDS,
   };
 
   AccessibilityNodeData();
@@ -159,9 +175,11 @@ struct CONTENT_EXPORT AccessibilityNodeData {
   void AddIntListAttribute(IntListAttribute attribute,
                            const std::vector<int32>& value);
 
-  // Convenience function, mainly for writing unit tests.
+  // Convenience functions, mainly for writing unit tests.
   // Equivalent to AddStringAttribute(ATTR_NAME, name).
   void SetName(std::string name);
+  // Equivalent to AddStringAttribute(ATTR_VALUE, value).
+  void SetValue(std::string value);
 
   #ifndef NDEBUG
   virtual std::string DebugString(bool recursive) const;