Create a public API around webkit::ppapi::PluginInstance and use it in chrome. After this, webkit/p…

content/renderer/pepper/pepper_file_io_host.cc

Index: content/renderer/pepper/pepper_file_io_host.cc
===================================================================
--- content/renderer/pepper/pepper_file_io_host.cc	(revision 213350)
+++ content/renderer/pepper/pepper_file_io_host.cc	(working copy)
@@ -20,7 +20,7 @@
 #include "ppapi/thunk/enter.h"
 #include "third_party/WebKit/public/web/WebPluginContainer.h"
 #include "webkit/plugins/ppapi/host_globals.h"
-#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+#include "webkit/plugins/ppapi/ppapi_plugin_instance_impl.h"
 #include "webkit/plugins/ppapi/ppb_file_ref_impl.h"
 #include "webkit/plugins/ppapi/quota_file_io.h"
 
@@ -58,6 +58,7 @@
                                    PP_Instance instance,
                                    PP_Resource resource)
     : ResourceHost(host->GetPpapiHost(), instance, resource),
+      plugin_delegate_(NULL),
       file_(base::kInvalidPlatformFileValue),
       file_system_type_(PP_FILESYSTEMTYPE_INVALID),
       quota_policy_(quota::kQuotaLimitTypeUnknown),
@@ -67,7 +68,10 @@
   // TODO(victorhsieh): eliminate plugin_delegate_ as it's no longer needed.
   webkit::ppapi::PluginInstance* plugin_instance =
       webkit::ppapi::HostGlobals::Get()->GetInstance(instance);
-  plugin_delegate_ = plugin_instance ? plugin_instance->delegate() : NULL;
+  if (plugin_instance) {
+    plugin_delegate_ = static_cast<webkit::ppapi::PluginInstanceImpl*>(
+        plugin_instance)->delegate();
+  }
 }
 
 PepperFileIOHost::~PepperFileIOHost() {