Rename confusing child_id to unique_id_win

content/browser/accessibility/browser_accessibility.h

Index: content/browser/accessibility/browser_accessibility.h
diff --git a/content/browser/accessibility/browser_accessibility.h b/content/browser/accessibility/browser_accessibility.h
index 62fff556c75cb0f8325fe793638505d8476b2deb..dad3c339bb1d20c47b279a18c9fcdda209cdc5bb 100644
--- a/content/browser/accessibility/browser_accessibility.h
+++ b/content/browser/accessibility/browser_accessibility.h
@@ -70,7 +70,6 @@ class CONTENT_EXPORT BrowserAccessibility {
   void InitializeTreeStructure(
       BrowserAccessibilityManager* manager,
       BrowserAccessibility* parent,
-      int32 child_id,
       int32 renderer_id,
       int32 index_in_parent);
 
@@ -150,7 +149,6 @@ class CONTENT_EXPORT BrowserAccessibility {
     return string_attributes_;
   }
 
-  int32 child_id() const { return child_id_; }
   const std::vector<BrowserAccessibility*>& children() const {
     return children_;
   }
@@ -253,9 +251,6 @@ class CONTENT_EXPORT BrowserAccessibility {
   // The parent of this object, may be NULL if we're the root object.
   BrowserAccessibility* parent_;
 
-  // The ID of this object; globally unique within the browser process.
-  int32 child_id_;
-
   // The index of this within its parent object.
   int32 index_in_parent_;