Add builders for tracing event's structural arguments

cc/scheduler/scheduler_state_machine_unittest.cc

 // Copyright 2011 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 "cc/scheduler/scheduler_state_machine.h"
 
+#include "base/debug/trace_event.h"
 #include "cc/scheduler/scheduler.h"
 #include "cc/test/begin_frame_args_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #define EXPECT_ACTION_UPDATE_STATE(action)                                   \
-  EXPECT_EQ(action, state.NextAction()) << *state.AsValue();                 \
+  EXPECT_EQ(action, state.NextAction()) << state.AsValue()->ToString();      \
   if (action == SchedulerStateMachine::ACTION_DRAW_AND_SWAP_IF_POSSIBLE ||   \
       action == SchedulerStateMachine::ACTION_DRAW_AND_SWAP_FORCED) {        \
     EXPECT_EQ(SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_INSIDE_DEADLINE, \
               state.begin_impl_frame_state())                                \
-        << *state.AsValue();                                                 \
+        << state.AsValue()->ToString();                                      \
   }                                                                          \
   state.UpdateState(action);                                                 \
   if (action == SchedulerStateMachine::ACTION_NONE) {                        \
     if (state.begin_impl_frame_state() ==                                    \
         SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_BEGIN_FRAME_STARTING)  \
       state.OnBeginImplFrameDeadlinePending();                               \
     if (state.begin_impl_frame_state() ==                                    \
         SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_INSIDE_DEADLINE)       \
       state.OnBeginImplFrameIdle();                                          \
   }
@@ skipping 1871 matching lines @@
   state.SetNeedsAnimate();
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
 
   state.OnBeginImplFrameDeadline();
   EXPECT_ACTION_UPDATE_STATE(
       SchedulerStateMachine::ACTION_DRAW_AND_SWAP_IF_POSSIBLE);
 }
 
 }  // namespace
 }  // namespace cc