Refactoring of new IPC-only pepper implementation

ppapi/examples/2d/paint_manager_example.cc

Index: ppapi/examples/2d/paint_manager_example.cc
diff --git a/ppapi/examples/2d/paint_manager_example.cc b/ppapi/examples/2d/paint_manager_example.cc
index 86bdbe79ed8f9f2a8e820cd682f24c57cbb413d7..229176da1a8e2e6f5448e7e0486134e85c912a1f 100644
--- a/ppapi/examples/2d/paint_manager_example.cc
+++ b/ppapi/examples/2d/paint_manager_example.cc
@@ -12,6 +12,9 @@
 #include "ppapi/cpp/view.h"
 #include "ppapi/utility/graphics/paint_manager.h"
 
+#include "ppapi/cpp/dev/file_chooser_dev.h"
+#include "ppapi/utility/completion_callback_factory.h"
+
 // Number of pixels to each side of the center of the square that we draw.
 static const int kSquareRadius = 2;
 
@@ -44,11 +47,21 @@ class MyInstance : public pp::Instance, public pp::PaintManager::Client {
         last_y_(0) {
     paint_manager_.Initialize(this, this, false);
     RequestInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
+    callback_factory_.Initialize(this);
+  }
+
+  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: {
+        chooser_ = pp::FileChooser_Dev(this, PP_FILECHOOSERMODE_OPEN, "text/html");
+        chooser_.Show(callback_factory_.NewCallbackWithOutput(&MyInstance::GotFile));
+
         pp::MouseInputEvent mouse_event(event);
         // Update the square on a mouse down.
         if (mouse_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_LEFT) {