Deprecate and remove unused PPB_Flash functions.

content/renderer/pepper/pepper_plugin_delegate_impl.cc

Index: content/renderer/pepper/pepper_plugin_delegate_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_delegate_impl.cc b/content/renderer/pepper/pepper_plugin_delegate_impl.cc
index 78e938e7ef9924298f625a16c5f3ef72f1a82e92..0b7b1a5bac324d9e7ef04a73706440adcf1d48d0 100644
--- a/content/renderer/pepper/pepper_plugin_delegate_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_delegate_impl.cc
@@ -1425,12 +1425,6 @@ double PepperPluginDelegateImpl::GetLocalTimeZoneOffset(base::Time t) {
   return result;
 }
 
-std::string PepperPluginDelegateImpl::GetDeviceID() {
-  std::string result;
-  render_view_->Send(new PepperMsg_GetDeviceID(&result));
-  return result;
-}
-
 PP_FlashLSORestrictions PepperPluginDelegateImpl::GetLocalDataRestrictions(
     const GURL& document_url,
     const GURL& plugin_url) {