Make EXPECT_ACTION_UPDATE_STATE failure output easier to understand.

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()->ToString();      \
+  EXPECT_STREQ(SchedulerStateMachine::ActionToString(action),                \

[Sami, 2014/10/13 09:43:05]

I'm guessing this doesn't hugely affect the test's run time?

[mithro-old, 2014/10/13 10:29:10]

The change is well within noise on a z620.

+               SchedulerStateMachine::ActionToString(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()->ToString();                                      \
   }                                                                          \
   state.UpdateState(action);                                                 \
   if (action == SchedulerStateMachine::ACTION_NONE) {                        \
     if (state.begin_impl_frame_state() ==                                    \
         SchedulerStateMachine::BEGIN_IMPL_FRAME_STATE_BEGIN_FRAME_STARTING)  \
@@ skipping 1824 matching lines @@
   // Verify we send another begin frame
   state.SetNeedsCommit();
   state.OnBeginImplFrame(CreateBeginFrameArgsForTesting());
   EXPECT_ACTION_UPDATE_STATE(
       SchedulerStateMachine::ACTION_SEND_BEGIN_MAIN_FRAME);
   EXPECT_ACTION_UPDATE_STATE(SchedulerStateMachine::ACTION_NONE);
 }
 
 }  // namespace
 }  // namespace cc