ppapi: Make sure the touch-event interface is detected correctly.

ppapi/examples/input/pointer_event_input.cc

Index: ppapi/examples/input/pointer_event_input.cc
diff --git a/ppapi/examples/2d/paint_manager_example.cc b/ppapi/examples/input/pointer_event_input.cc
similarity index 87%
copy from ppapi/examples/2d/paint_manager_example.cc
copy to ppapi/examples/input/pointer_event_input.cc
index 86bdbe79ed8f9f2a8e820cd682f24c57cbb413d7..57c3d313046825ba3c92e8a4bf648d88da516502 100644
--- a/ppapi/examples/2d/paint_manager_example.cc
+++ b/ppapi/examples/input/pointer_event_input.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 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.
 
@@ -43,7 +43,7 @@ class MyInstance : public pp::Instance, public pp::PaintManager::Client {
         last_x_(0),
         last_y_(0) {
     paint_manager_.Initialize(this, this, false);
-    RequestInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
+    RequestInputEvents(PP_INPUTEVENT_CLASS_MOUSE | PP_INPUTEVENT_CLASS_TOUCH);
   }
 
   virtual bool HandleInputEvent(const pp::InputEvent& event) {
@@ -66,6 +66,24 @@ class MyInstance : public pp::Instance, public pp::PaintManager::Client {
         }
         return true;
       }
+
+      case PP_INPUTEVENT_TYPE_TOUCHSTART: {
+        pp::TouchInputEvent touch(event);
+        // Update the square on a touch down.
+        uint32_t count = touch.GetTouchCount(PP_TOUCHLIST_TYPE_CHANGEDTOUCHES);
+        for (uint32_t i = 0; i < count; ++i) {
+          pp::TouchPoint point = touch.GetTouchByIndex(
+              PP_TOUCHLIST_TYPE_CHANGEDTOUCHES, i);
+          UpdateSquare(static_cast<int>(point.position().x()),
+                       static_cast<int>(point.position().y()));
+        }
+        return true;
+      }
+      case PP_INPUTEVENT_TYPE_TOUCHMOVE:
+      case PP_INPUTEVENT_TYPE_TOUCHEND:
+      case PP_INPUTEVENT_TYPE_TOUCHCANCEL:
+        return true;
+
       default:
         return false;
     }