Change TypeConverter<X,Y>::ConvertFrom and ConvertTo into a single symmetric

mojo/services/html_viewer/html_document_view.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/services/html_viewer/html_document_view.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_util.h"
@@ skipping 196 matching lines @@
 }
 
 void HTMLDocumentView::OnViewDestroyed(View* view) {
   DCHECK_EQ(view, root_);
   view->RemoveObserver(this);
   root_ = NULL;
 }
 
 void HTMLDocumentView::OnViewInputEvent(View* view, const EventPtr& event) {
   scoped_ptr<blink::WebInputEvent> web_event =
-      TypeConverter<EventPtr, scoped_ptr<blink::WebInputEvent> >::ConvertTo(
-          event);
+      event.To<scoped_ptr<blink::WebInputEvent> >();
   if (web_event)
     web_view_->handleInputEvent(*web_event);
 }
 
 void HTMLDocumentView::Repaint() {
   repaint_pending_ = false;
 
   web_view_->animate(0.0);
   web_view_->layout();
 
   int width = web_view_->size().width;
   int height = web_view_->size().height;
 
   skia::RefPtr<SkCanvas> canvas = skia::AdoptRef(SkCanvas::NewRaster(
       SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType)));
 
   web_view_->paint(canvas.get(), gfx::Rect(0, 0, width, height));
 
   root_->SetContents(canvas->getDevice()->accessBitmap(false));
 }
 
 }  // namespace mojo