Provision to start base::SimpleTestTickClock at initial ticks

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/shared_memory.h"
@@ skipping 2413 matching lines @@
   EXPECT_EQ(2, callback_count_);
   EXPECT_FALSE(result_);
 }
 
 TEST_F(RenderWidgetHostViewAuraCopyRequestTest, PresentTime) {
   InitializeView();
   InstallFakeTickClock();
 
   // Verify our initial state.
   EXPECT_EQ(base::TimeTicks(), frame_subscriber_->last_present_time());
-  EXPECT_EQ(base::TimeTicks(), tick_clock_->NowTicks());
+  // SimpleTestTickClock starts at 1 microsecond
+  EXPECT_EQ(base::TimeTicks() + base::TimeDelta::FromMicroseconds(1),
+            tick_clock_->NowTicks());
 
   // Start our fake clock from a non-zero, but not an even multiple of the
   // interval, value to differentiate it from our initialization state.
   const base::TimeDelta kDefaultInterval =
       cc::BeginFrameArgs::DefaultInterval();
   tick_clock_->Advance(kDefaultInterval / 3);
 
   // Swap the first frame without any vsync information.
   ASSERT_EQ(base::TimeTicks(), vsync_timebase());
   ASSERT_EQ(base::TimeDelta(), vsync_interval());
@@ skipping 1187 matching lines @@
   ViewMsg_SetSurfaceIdNamespace::Read(msg, &params);
   view_->InitAsChild(NULL);
   view_->Show();
   view_->SetSize(size);
   view_->OnSwapCompositorFrame(0,
                                MakeDelegatedFrame(1.f, size, gfx::Rect(size)));
   EXPECT_EQ(view_->GetSurfaceIdNamespace(), base::get<0>(params));
 }
 
 }  // namespace content