Use unique IDs for accessibility nodes on Android

content/browser/accessibility/browser_accessibility_mac.h

Index: content/browser/accessibility/browser_accessibility_mac.h
diff --git a/content/browser/accessibility/browser_accessibility_mac.h b/content/browser/accessibility/browser_accessibility_mac.h
index aed8fd49e08ef4630c0059a66b828b65a84e6f4c..d5160243274bb902aca42cf0b92313ff7e2504e1 100644
--- a/content/browser/accessibility/browser_accessibility_mac.h
+++ b/content/browser/accessibility/browser_accessibility_mac.h
@@ -11,11 +11,19 @@
 
 #include "base/macros.h"
 #include "content/browser/accessibility/browser_accessibility.h"
+#include "content/common/content_export.h"
 
 @class BrowserAccessibilityCocoa;
 
 namespace content {
 
+#if __OBJC__
+CONTENT_EXPORT const BrowserAccessibilityCocoa* ToBrowserAccessibilityCocoa(
+    const BrowserAccessibility* obj);
+CONTENT_EXPORT BrowserAccessibilityCocoa* ToBrowserAccessibilityCocoa(
+    BrowserAccessibility* obj);
+#endif
+
 class BrowserAccessibilityMac : public BrowserAccessibility {
  public:
   // BrowserAccessibility overrides.