Move some accessibility methods, enums and interfaces into the content/public API.

content/browser/accessibility/dump_accessibility_tree_helper_win.cc

Index: content/browser/accessibility/dump_accessibility_tree_helper_win.cc
diff --git a/content/browser/accessibility/dump_accessibility_tree_helper_win.cc b/content/browser/accessibility/dump_accessibility_tree_helper_win.cc
index 6dcbcc920b87ac5dbc9dfb4805e2943397f70151..d7052da2b1c5c02d0c95847379972b6f688058a4 100644
--- a/content/browser/accessibility/dump_accessibility_tree_helper_win.cc
+++ b/content/browser/accessibility/dump_accessibility_tree_helper_win.cc
@@ -160,25 +160,30 @@ string16 DumpAccessibilityTreeHelper::ToString(
   return UTF8ToUTF16(prefix) + FinishLine() + ASCIIToUTF16("\n");
 }
 
+// static
 const base::FilePath::StringType
-DumpAccessibilityTreeHelper::GetActualFileSuffix() const {
+DumpAccessibilityTreeHelper::GetActualFileSuffix() {
   return FILE_PATH_LITERAL("-actual-win.txt");
 }
 
+// static
 const base::FilePath::StringType
-DumpAccessibilityTreeHelper::GetExpectedFileSuffix() const {
+DumpAccessibilityTreeHelper::GetExpectedFileSuffix() {
   return FILE_PATH_LITERAL("-expected-win.txt");
 }
 
-const std::string DumpAccessibilityTreeHelper::GetAllowEmptyString() const {
+// static
+const std::string DumpAccessibilityTreeHelper::GetAllowEmptyString() {
   return "@WIN-ALLOW-EMPTY:";
 }
 
-const std::string DumpAccessibilityTreeHelper::GetAllowString() const {
+// static
+const std::string DumpAccessibilityTreeHelper::GetAllowString() {
   return "@WIN-ALLOW:";
 }
 
-const std::string DumpAccessibilityTreeHelper::GetDenyString() const {
+// static
+const std::string DumpAccessibilityTreeHelper::GetDenyString() {
   return "@WIN-DENY:";
 }