Implement the file chooser as a new resource "host"

webkit/plugins/ppapi/plugin_delegate.h

Index: webkit/plugins/ppapi/plugin_delegate.h
diff --git a/webkit/plugins/ppapi/plugin_delegate.h b/webkit/plugins/ppapi/plugin_delegate.h
index 6f851907bdded5f64c17342ce3b35da16abab203..c70076195ae67d3e141a986d6fe038a4b8fcff98 100644
--- a/webkit/plugins/ppapi/plugin_delegate.h
+++ b/webkit/plugins/ppapi/plugin_delegate.h
@@ -61,6 +61,11 @@ class PPB_X509Certificate_Fields;
 struct DeviceRefData;
 struct HostPortPair;
 struct Preferences;
+
+namespace thunk {
+class ResourceCreationAPI;
+}
+
 }
 
 namespace skia {
@@ -343,6 +348,10 @@ class PluginDelegate {
   // from this call.
   virtual void InstanceDeleted(PluginInstance* instance) = 0;
 
+  // Creates the resource creation API for the given instance.
+  virtual scoped_ptr< ::ppapi::thunk::ResourceCreationAPI>
+      CreateResourceCreationAPI(PluginInstance* instance) = 0;
+
   // Returns a pointer (ownership not transferred) to the bitmap to paint the
   // sad plugin screen with. Returns NULL on failure.
   virtual SkBitmap* GetSadPluginBitmap() = 0;