[devtools] Add DOMSnapshot domain for dom+layout+style snapshots.

headless/lib/browser/headless_devtools_client_impl.cc

 // Copyright 2016 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 "headless/lib/browser/headless_devtools_client_impl.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/json/json_reader.h"
@@ skipping 27 matching lines @@
       accessibility_domain_(this),
       animation_domain_(this),
       application_cache_domain_(this),
       browser_domain_(this),
       cache_storage_domain_(this),
       console_domain_(this),
       css_domain_(this),
       database_domain_(this),
       debugger_domain_(this),
       device_orientation_domain_(this),
+      dom_domain_(this),
       dom_debugger_domain_(this),
-      dom_domain_(this),
+      dom_snapshot_domain_(this),
       dom_storage_domain_(this),
       emulation_domain_(this),
       heap_profiler_domain_(this),
       indexeddb_domain_(this),
       input_domain_(this),
       inspector_domain_(this),
       io_domain_(this),
       layer_tree_domain_(this),
       log_domain_(this),
       memory_domain_(this),
@@ skipping 206 matching lines @@
 }
 
 debugger::Domain* HeadlessDevToolsClientImpl::GetDebugger() {
   return &debugger_domain_;
 }
 
 device_orientation::Domain* HeadlessDevToolsClientImpl::GetDeviceOrientation() {
   return &device_orientation_domain_;
 }
 
+dom::Domain* HeadlessDevToolsClientImpl::GetDOM() {
+  return &dom_domain_;
+}
+
 dom_debugger::Domain* HeadlessDevToolsClientImpl::GetDOMDebugger() {
   return &dom_debugger_domain_;
 }
 
-dom::Domain* HeadlessDevToolsClientImpl::GetDOM() {
-  return &dom_domain_;
+dom_snapshot::Domain* HeadlessDevToolsClientImpl::GetDOMSnapshot() {
+  return &dom_snapshot_domain_;
 }
 
 dom_storage::Domain* HeadlessDevToolsClientImpl::GetDOMStorage() {
   return &dom_storage_domain_;
 }
 
 emulation::Domain* HeadlessDevToolsClientImpl::GetEmulation() {
   return &emulation_domain_;
 }
 
@@ skipping 119 matching lines @@
 HeadlessDevToolsClientImpl::Callback::Callback(
     base::Callback<void(const base::Value&)> callback)
     : callback_with_result(callback) {}
 
 HeadlessDevToolsClientImpl::Callback::~Callback() {}
 
 HeadlessDevToolsClientImpl::Callback& HeadlessDevToolsClientImpl::Callback::
 operator=(Callback&& other) = default;
 
 }  // namespace headless