Support getting the font list in Pepper. This currently only works out of

content/common/pepper_plugin_registry.cc

Index: content/common/pepper_plugin_registry.cc
===================================================================
--- content/common/pepper_plugin_registry.cc	(revision 85766)
+++ content/common/pepper_plugin_registry.cc	(working copy)
@@ -229,22 +229,3 @@
   DCHECK(ChildProcess::current()) << "Must be in the renderer.";
   return ChildProcess::current()->GetShutDownEvent();
 }
-
-std::set<PP_Instance>* PepperPluginRegistry::GetGloballySeenInstanceIDSet() {
-  // This function is not needed on the host side of the proxy.
-  NOTREACHED();
-  return NULL;
-}
-
-ppapi::WebKitForwarding* PepperPluginRegistry::GetWebKitForwarding() {
-  // This function is not needed on the host side of the proxy.
-  NOTREACHED();
-  return NULL;
-}
-
-void PepperPluginRegistry::PostToWebKitThread(
-    const tracked_objects::Location& from_here,
-    const base::Closure& task) {
-  // This function is not needed on the host side of the proxy.
-  NOTREACHED();
-}