Add support for mapping node tree on the client.

mojo/services/view_manager/view_manager_connection_unittest.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 <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "mojo/public/cpp/bindings/allocation_scope.h"
 #include "mojo/public/cpp/environment/environment.h"
+#include "mojo/services/public/cpp/view_manager/util.h"
 #include "mojo/services/public/cpp/view_manager/view_manager_types.h"
 #include "mojo/services/public/interfaces/view_manager/view_manager.mojom.h"
 #include "mojo/shell/shell_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace services {
 namespace view_manager {
 
 namespace {
 
 base::RunLoop* current_run_loop = NULL;
 
-uint16_t FirstIdFromTransportId(uint32_t id) {
-  return static_cast<uint16_t>((id >> 16) & 0xFFFF);
-}
-
-uint16_t SecondIdFromTransportId(uint32_t id) {
-  return static_cast<uint16_t>(id & 0xFFFF);
-}
-
 // Sets |current_run_loop| and runs it. It is expected that someone else quits
 // the loop.
 void DoRunLoop() {
   base::RunLoop run_loop;
   current_run_loop = &run_loop;
   current_run_loop->Run();
   current_run_loop = NULL;
 }
 
 // Converts |id| into a string.
 std::string NodeIdToString(TransportNodeId id) {
   return (id == 0) ? "null" :
-      base::StringPrintf("%d,%d", FirstIdFromTransportId(id),
-                         SecondIdFromTransportId(id));
+      base::StringPrintf("%d,%d", HiWord(id), LoWord(id));
 }
 
 // Boolean callback. Sets |result_cache| to the value of |result| and quits
 // the run loop.
 void BooleanCallback(bool* result_cache, bool result) {
   *result_cache = result;
   current_run_loop->Quit();
 }
 
 struct TestNode {
@@ skipping 569 matching lines @@
     GetNodeTree(view_manager2_.get(), CreateNodeId(1, 1), &nodes);
     ASSERT_EQ(2u, nodes.size());
     EXPECT_EQ("node=1,1 parent=0,1 view=null", nodes[0].ToString());
     EXPECT_EQ("node=1,11 parent=1,1 view=1,51", nodes[1].ToString());
   }
 }
 
 }  // namespace view_manager
 }  // namespace services
 }  // namespace mojo