Refactor FileIO to the new design

content/renderer/pepper/renderer_ppapi_host_impl.cc

Index: content/renderer/pepper/renderer_ppapi_host_impl.cc
diff --git a/content/renderer/pepper/renderer_ppapi_host_impl.cc b/content/renderer/pepper/renderer_ppapi_host_impl.cc
index da42d8598716b2bd6e595652656fa0839dad1c51..8697bcd3057b29d25102adede8ce56e07133f5c8 100644
--- a/content/renderer/pepper/renderer_ppapi_host_impl.cc
+++ b/content/renderer/pepper/renderer_ppapi_host_impl.cc
@@ -20,6 +20,7 @@
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 
 using webkit::ppapi::HostGlobals;
+using webkit::ppapi::PluginDelegate;
 using webkit::ppapi::PluginInstance;
 using webkit::ppapi::PluginModule;
 
@@ -138,16 +139,24 @@ ppapi::host::PpapiHost* RendererPpapiHostImpl::GetPpapiHost() {
   return ppapi_host_.get();
 }
 
-RenderView* RendererPpapiHostImpl::GetRenderViewForInstance(
+PluginDelegate* RendererPpapiHostImpl::GetDelegateForInstance(
     PP_Instance instance) const {
   PluginInstance* instance_object = GetAndValidateInstance(instance);
   if (!instance_object)
     return NULL;
 
+  return instance_object->delegate();
+}
+
+RenderView* RendererPpapiHostImpl::GetRenderViewForInstance(
+    PP_Instance instance) const {
+  webkit::ppapi::PluginDelegate* delegate = GetDelegateForInstance(instance);
+  if (!delegate)
+    return NULL;
+
   // Since we're the embedder, we can make assumptions about the delegate on
   // the instance and get back to our RenderView.
-  return static_cast<PepperPluginDelegateImpl*>(
-      instance_object->delegate())->render_view();
+  return static_cast<PepperPluginDelegateImpl*>(delegate)->render_view();
 }
 
 bool RendererPpapiHostImpl::IsValidInstance(