Remove dependency on cc::TestNowSource from scheduler code

content/child/scheduler/time_source.cc

Index: content/child/scheduler/time_source.cc
diff --git a/content/common/gpu/media/vp8_picture.cc b/content/child/scheduler/time_source.cc
similarity index 55%
copy from content/common/gpu/media/vp8_picture.cc
copy to content/child/scheduler/time_source.cc
index 764c3b1bd739a88810bbcb1ca47dbafec9c036e0..ce64df85d813a9859f4232c48129acca9b4dd129 100644
--- a/content/common/gpu/media/vp8_picture.cc
+++ b/content/child/scheduler/time_source.cc
@@ -2,18 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "content/common/gpu/media/vp8_picture.h"
+#include "content/child/scheduler/time_source.h"
 
 namespace content {
 
-VP8Picture::VP8Picture() {
+TimeSource::TimeSource() {
 }
 
-VP8Picture::~VP8Picture() {
+TimeSource::~TimeSource() {
 }
 
-V4L2VP8Picture* VP8Picture::AsV4L2VP8Picture() {
-  return nullptr;
+base::TimeTicks TimeSource::Now() const {
+  return base::TimeTicks::Now();
 }
 
 }  // namespace content