Provision to start base::SimpleTestTickClock at initial ticks

content/browser/media/capture/cursor_renderer_aura_unittest.cc

 // Copyright (c) 2015 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/media/capture/cursor_renderer_aura.h"
 
 #include <stdint.h>
 
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 117 matching lines @@
   scoped_ptr<aura::Window> window_;
   scoped_ptr<CursorRendererAura> cursor_renderer_;
 };
 
 TEST_F(CursorRendererAuraTest, CursorDuringMouseMovement) {
   // Keep window activated.
   wm::ActivateWindow(window_.get());
 
   EXPECT_FALSE(CursorDisplayed());
 
-  base::SimpleTestTickClock clock;
+  base::SimpleTestTickClock clock((base::TimeTicks()));
   SetTickClock(&clock);
 
   // Cursor displayed after mouse movement.
   MoveMouseCursorWithinWindow();
   EXPECT_TRUE(CursorDisplayed());
 
   // Cursor not be displayed after idle period.
   clock.Advance(base::TimeDelta::FromSeconds(5));
   SnapshotCursorState(gfx::Rect(10, 10, 200, 200));
   EXPECT_FALSE(CursorDisplayed());
@@ skipping 45 matching lines @@
   MoveMouseCursorWithinWindow(gfx::Point(60, 60));
   SnapshotCursorState(gfx::Rect(size));
   EXPECT_TRUE(CursorDisplayed());
 
   EXPECT_FALSE(NonZeroPixelsInRegion(frame, gfx::Rect(50, 50, 70, 70)));
   RenderCursorOnVideoFrame(frame);
   EXPECT_TRUE(NonZeroPixelsInRegion(frame, gfx::Rect(50, 50, 70, 70)));
 }
 
 }  // namespace content