Uses isEditable and isRichlyEditable to determine which attributes to expose on Mac and how to repr…

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 7afcb30426c6481756c7d3c20af6d4bca173ef30..f59dde4d0bafc2598a73cf3ca981423246aa4495 100644
--- a/content/browser/accessibility/browser_accessibility_cocoa.mm
+++ b/content/browser/accessibility/browser_accessibility_cocoa.mm
@@ -1562,8 +1562,7 @@ bool InitializeAccessibilityTreeSearch(
         NSAccessibilityCellForColumnAndRowParameterizedAttribute,
         nil]];
   }
-  if ([[self role] isEqualToString:NSAccessibilityTextFieldRole] ||
-      [[self role] isEqualToString:NSAccessibilityTextAreaRole]) {
+  if (browserAccessibility_->IsEditableText()) {
     [ret addObjectsFromArray:[NSArray arrayWithObjects:
         NSAccessibilityLineForIndexParameterizedAttribute,
         NSAccessibilityRangeForLineParameterizedAttribute,
@@ -1699,15 +1698,6 @@ bool InitializeAccessibilityTreeSearch(
         @"AXLoaded",
         @"AXLoadingProgress",
         nil]];
-  } else if ([role isEqualToString:NSAccessibilityTextFieldRole] ||
-             [role isEqualToString:NSAccessibilityTextAreaRole]) {
-    [ret addObjectsFromArray:[NSArray arrayWithObjects:
-        NSAccessibilityInsertionPointLineNumberAttribute,
-        NSAccessibilityNumberOfCharactersAttribute,
-        NSAccessibilitySelectedTextAttribute,
-        NSAccessibilitySelectedTextRangeAttribute,
-        NSAccessibilityVisibleCharacterRangeAttribute,
-        nil]];
   } else if ([role isEqualToString:NSAccessibilityTabGroupRole]) {
     [ret addObject:NSAccessibilityTabsAttribute];
   } else if ([role isEqualToString:NSAccessibilityProgressIndicatorRole] ||
@@ -1752,6 +1742,17 @@ bool InitializeAccessibilityTreeSearch(
         nil]];
   }
 
+  // Caret navigation and text selection attributes.
+  if (browserAccessibility_->IsEditableText()) {
+    [ret addObjectsFromArray:[NSArray arrayWithObjects:
+        NSAccessibilityInsertionPointLineNumberAttribute,
+        NSAccessibilityNumberOfCharactersAttribute,
+        NSAccessibilitySelectedTextAttribute,
+        NSAccessibilitySelectedTextRangeAttribute,
+        NSAccessibilityVisibleCharacterRangeAttribute,
+        nil]];
+  }
+
   // Add the url attribute only if it has a valid url.
   if ([self url] != nil) {
     [ret addObjectsFromArray:[NSArray arrayWithObjects: