Disable accessibility when VoiceOver is turned off.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 32705ca85bd22eac78a5d7099615f0ab4d6ae9e9..769db2eb2891de2ac7c173a7a85801c6a1c71537 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1360,6 +1360,11 @@ void RenderFrameImpl::OnSetAccessibilityMode(AccessibilityMode new_mode) {
     return;
   accessibility_mode_ = new_mode;
   if (renderer_accessibility_) {
+    // Note: this isn't called automatically by the destructor because
+    // there'd be no point in calling it in frame teardown, only if there's
+    // an accessibility mode change but the frame is persisting.
+    renderer_accessibility_->DisableAccessibility();
+
     delete renderer_accessibility_;
     renderer_accessibility_ = NULL;
   }