Allow EmbedRoot to be called multiple times.

mojo/services/view_manager/test_change_tracker.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/view_manager/test_change_tracker.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "mojo/common/common_type_converters.h"
 #include "mojo/services/public/cpp/geometry/geometry_type_converters.h"
@@ skipping 62 matching lines @@
           "ViewReplaced node=%s new_view=%s old_view=%s",
           NodeIdToString(change.node_id).c_str(),
           NodeIdToString(change.view_id).c_str(),
           NodeIdToString(change.view_id2).c_str());
 
     case CHANGE_TYPE_INPUT_EVENT:
       return base::StringPrintf(
           "InputEvent view=%s event_action=%d",
           NodeIdToString(change.view_id).c_str(),
           change.event_action);
+    case CHANGE_TYPE_EMBED_ROOT:
+      return base::StringPrintf("EmbedRoot url=%s", change.embed_url.data());
   }
   return std::string();
 }
 
 }  // namespace
 
 std::vector<std::string> ChangesToDescription1(
     const std::vector<Change>& changes) {
   std::vector<std::string> strings(changes.size());
   for (size_t i = 0; i < changes.size(); ++i)
@@ skipping 123 matching lines @@
 }
 
 void TestChangeTracker::OnViewInputEvent(Id view_id, EventPtr event) {
   Change change;
   change.type = CHANGE_TYPE_INPUT_EVENT;
   change.view_id = view_id;
   change.event_action = event->action;
   AddChange(change);
 }
 
+void TestChangeTracker::OnEmbedRoot(const String& url) {
+  Change change;
+  change.type = CHANGE_TYPE_EMBED_ROOT;
+  change.embed_url = url;
+  AddChange(change);
+}
+
 void TestChangeTracker::AddChange(const Change& change) {
   changes_.push_back(change);
   if (delegate_)
     delegate_->OnChangeAdded();
 }
 
 std::string TestNode::ToString() const {
   return base::StringPrintf("node=%s parent=%s view=%s",
                             NodeIdToString(node_id).c_str(),
                             NodeIdToString(parent_id).c_str(),
                             NodeIdToString(view_id).c_str());
 }
 
 }  // namespace service
 }  // namespace view_manager
 }  // namespace mojo