Implement the file chooser as a new resource "host"

ppapi/example/example.cc

Index: ppapi/example/example.cc
diff --git a/ppapi/example/example.cc b/ppapi/example/example.cc
index 0832deedcbcd2801d8433f2c6a35e46948c9aed0..073596a06a63309b950d830fb5e53f638015024b 100644
--- a/ppapi/example/example.cc
+++ b/ppapi/example/example.cc
@@ -19,6 +19,7 @@
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/pp_rect.h"
 #include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/dev/file_chooser_dev.h"
 #include "ppapi/cpp/dev/memory_dev.h"
 #include "ppapi/cpp/dev/scriptable_object_deprecated.h"
 #include "ppapi/cpp/graphics_2d.h"
@@ -180,6 +181,7 @@ class MyInstance : public pp::InstancePrivate, public MyFetcherClient {
         print_settings_valid_(false),
         showing_custom_cursor_(false) {
     RequestInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
+    callback_factory_.Initialize(this);
   }
 
   virtual ~MyInstance() {
@@ -207,11 +209,20 @@ class MyInstance : public pp::InstancePrivate, public MyFetcherClient {
     return true;
   }
 
+  pp::FileChooser_Dev chooser_;
+  pp::CompletionCallbackFactory<MyInstance> callback_factory_;
+
+  void GotFile(int32_t result, const std::vector<pp::FileRef>& files) {
+  }
+
   virtual bool HandleInputEvent(const pp::InputEvent& event) {
     switch (event.GetType()) {
       case PP_INPUTEVENT_TYPE_MOUSEDOWN:
-        SayHello();
-        ToggleCursor();
+        chooser_ = pp::FileChooser_Dev(this, PP_FILECHOOSERMODE_OPEN, "text/html");
+        //< std::vector<FileRef> >
+        chooser_.Show(callback_factory_.NewCallbackWithOutput(&MyInstance::GotFile));
+        //SayHello();
+        //ToggleCursor();
         return true;
       case PP_INPUTEVENT_TYPE_MOUSEMOVE:
         return true;