Mozart: Implement basic input event dispatch with hit testing.

apps/moterm/moterm_view.cc

 // Copyright 2015 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 "apps/moterm/moterm_view.h"
 
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES
 #endif
 
@@ skipping 221 matching lines @@
 
   auto update = mojo::gfx::composition::SceneUpdate::New();
   mojo::gfx::composition::ResourcePtr moterm_resource =
       ganesh_renderer()->DrawCanvas(
           view_size_,
           base::Bind(&MotermView::DrawContent, base::Unretained(this)));
   DCHECK(moterm_resource);
   update->resources.insert(kMotermImageResourceId, moterm_resource.Pass());
 
   auto root_node = mojo::gfx::composition::Node::New();
+  root_node->hit_test_behavior = mojo::gfx::composition::HitTestBehavior::New();
   root_node->op = mojo::gfx::composition::NodeOp::New();
   root_node->op->set_image(mojo::gfx::composition::ImageNodeOp::New());
   root_node->op->get_image()->content_rect = bounds.Clone();
   root_node->op->get_image()->image_resource_id = kMotermImageResourceId;
   update->nodes.insert(kRootNodeId, root_node.Pass());
 
   auto metadata = mojo::gfx::composition::SceneMetadata::New();
   metadata->presentation_time = frame_info.presentation_time;
 
   scene()->Update(update.Pass());
@@ skipping 66 matching lines @@
 
 void MotermView::OnKeyPressed(mojo::EventPtr key_event) {
   std::string input_sequence =
       GetInputSequenceForKeyPressedEvent(*key_event, keypad_application_mode_);
   if (input_sequence.empty())
     return;
 
   if (driver_)
     driver_->SendData(input_sequence.data(), input_sequence.size());
 }