Initial support for native accessibility in ARC

components/exo/surface.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 "components/exo/surface.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/trace_event/trace_event.h"
 #include "base/trace_event/trace_event_argument.h"
 #include "cc/quads/render_pass.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/resources/single_release_callback.h"
 #include "cc/surfaces/sequence_surface_reference_factory.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_id_allocator.h"
+#include "components/exo/ax_tree_source_surface.h"
 #include "components/exo/buffer.h"
 #include "components/exo/surface_delegate.h"
 #include "components/exo/surface_observer.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/aura/window_property.h"
 #include "ui/aura/window_targeter.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/hit_test.h"
@@ skipping 137 matching lines @@
 // Surface, public:
 
 // TODO(fsamuel): exo should not use context_factory_private. Instead, we should
 // request a CompositorFrameSink from the aura::Window. Setting up the
 // BeginFrame hierarchy should be an internal implementation detail of aura or
 // mus in aura-mus.
 Surface::Surface()
     : window_(new aura::Window(new CustomWindowDelegate(this))),
       frame_sink_id_(aura::Env::GetInstance()
                          ->context_factory_private()
-                         ->AllocateFrameSinkId()) {
+                         ->AllocateFrameSinkId()),
+      ax_tree_source_(nullptr) {
   compositor_frame_sink_holder_ = new CompositorFrameSinkHolder(
       this, frame_sink_id_,
       aura::Env::GetInstance()->context_factory_private()->GetSurfaceManager());
   surface_reference_factory_ =
       new CustomSurfaceReferenceFactory(compositor_frame_sink_holder_.get());
   window_->SetType(ui::wm::WINDOW_TYPE_CONTROL);
   window_->SetName("ExoSurface");
   window_->SetProperty(kSurfaceKey, this);
   window_->Init(ui::LAYER_SOLID_COLOR);
   window_->SetEventTargeter(base::WrapUnique(new CustomWindowTargeter));
@@ skipping 652 matching lines @@
 
 int64_t Surface::GetPropertyInternal(const void* key,
                                      int64_t default_value) const {
   std::map<const void*, Value>::const_iterator iter = prop_map_.find(key);
   if (iter == prop_map_.end())
     return default_value;
   return iter->second.value;
 }
 
 }  // namespace exo