Initial support for native accessibility in ARC

content/browser/accessibility/browser_accessibility_cocoa.mm

Index: content/browser/accessibility/browser_accessibility_cocoa.mm
diff --git a/content/browser/accessibility/browser_accessibility_cocoa.mm b/content/browser/accessibility/browser_accessibility_cocoa.mm
index c057729d3fe15fccd9fd95b56bec6e66f499023b..6469bc207ff670f33f95892835dc8eec5c0419fe 100644
--- a/content/browser/accessibility/browser_accessibility_cocoa.mm
+++ b/content/browser/accessibility/browser_accessibility_cocoa.mm
@@ -32,8 +32,10 @@
 using AXPlatformPositionInstance =
     content::AXPlatformPosition::AXPositionInstance;
 using AXPlatformRange = ui::AXRange<AXPlatformPositionInstance::element_type>;
+using AXTextMarkerRangeRef = CFTypeRef;
+using AXTextMarkerRef = CFTypeRef;
+using StringAttribute = ui::AXStringAttribute;
 using content::AXPlatformPosition;
-using content::AXTreeIDRegistry;
 using content::AccessibilityMatchPredicate;
 using content::BrowserAccessibility;
 using content::BrowserAccessibilityDelegate;
@@ -42,9 +44,7 @@ using content::BrowserAccessibilityManagerMac;
 using content::ContentClient;
 using content::OneShotAccessibilityTreeSearch;
 using ui::AXNodeData;
-using StringAttribute = ui::AXStringAttribute;
-using AXTextMarkerRef = CFTypeRef;
-using AXTextMarkerRangeRef = CFTypeRef;
+using ui::AXTreeIDRegistry;
 
 namespace {