Revert 284065 "Revert of Revert of Migrate accessibility from Re..."

trunk/src/chrome/browser/chrome_browser_application_mac.mm

Index: trunk/src/chrome/browser/chrome_browser_application_mac.mm
===================================================================
--- trunk/src/chrome/browser/chrome_browser_application_mac.mm	(revision 284469)
+++ trunk/src/chrome/browser/chrome_browser_application_mac.mm	(working copy)
@@ -538,6 +538,11 @@
   if ([attribute isEqualToString:@"AXEnhancedUserInterface"] &&
       [value intValue] == 1) {
     content::BrowserAccessibilityState::GetInstance()->OnScreenReaderDetected();
+    for (TabContentsIterator it; !it.done(); it.Next()) {
+      if (content::WebContents* contents = *it)
+        if (content::RenderViewHost* rvh = contents->GetRenderViewHost())
+          rvh->EnableFullAccessibilityMode();
+    }
   }
   return [super accessibilitySetValue:value forAttribute:attribute];
 }