Removing the TimeSource abstraction as it is not used anywhere.

BUG=380987

Review URL: https://codereview.chromium.org/327943006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276564 0039d316-1c4b-4281-b951-d872f2087c98

cc/cc.gyp

@@ -439,7 +439,6 @@
         'scheduler/scheduler_settings.h',
         'scheduler/scheduler_state_machine.cc',
         'scheduler/scheduler_state_machine.h',
-        'scheduler/time_source.h',
         'trees/blocking_task_runner.cc',
         'trees/blocking_task_runner.h',
         'trees/damage_tracker.cc',

cc/scheduler/delay_based_time_source.h

@@ -10,33 +10,41 @@
 #include "base/memory/weak_ptr.h"
 #include "base/values.h"
 #include "cc/base/cc_export.h"
-#include "cc/scheduler/time_source.h"
 
 namespace base { class SingleThreadTaskRunner; }
 
 namespace cc {
 
+class CC_EXPORT TimeSourceClient {
+ public:
+  virtual void OnTimerTick() = 0;
+
+ protected:
+  virtual ~TimeSourceClient() {}
+};
+
 // This timer implements a time source that achieves the specified interval
 // in face of millisecond-precision delayed callbacks and random queueing
 // delays. DelayBasedTimeSource uses base::TimeTicks::Now as its timebase.
-class CC_EXPORT DelayBasedTimeSource : public TimeSource {
+class CC_EXPORT DelayBasedTimeSource
+    : public base::RefCounted<DelayBasedTimeSource> {
  public:
   static scoped_refptr<DelayBasedTimeSource> Create(
       base::TimeDelta interval, base::SingleThreadTaskRunner* task_runner);
 
-  virtual void SetClient(TimeSourceClient* client) OVERRIDE;
+  virtual void SetClient(TimeSourceClient* client);
 
   // TimeSource implementation
   virtual void SetTimebaseAndInterval(base::TimeTicks timebase,
-                                      base::TimeDelta interval) OVERRIDE;
+                                      base::TimeDelta interval);
 
-  virtual base::TimeTicks SetActive(bool active) OVERRIDE;
-  virtual bool Active() const OVERRIDE;
+  virtual base::TimeTicks SetActive(bool active);
+  virtual bool Active() const;
 
   // Get the last and next tick times. NextTickTime() returns null when
   // inactive.
-  virtual base::TimeTicks LastTickTime() const OVERRIDE;
-  virtual base::TimeTicks NextTickTime() const OVERRIDE;
+  virtual base::TimeTicks LastTickTime() const;
+  virtual base::TimeTicks NextTickTime() const;
 
   // Virtual for testing.
   virtual base::TimeTicks Now() const;
@@ -77,6 +85,7 @@ class CC_EXPORT DelayBasedTimeSource : public TimeSource {
   base::WeakPtrFactory<DelayBasedTimeSource> weak_factory_;
 
  private:
+  friend class base::RefCounted<DelayBasedTimeSource>;
   DISALLOW_COPY_AND_ASSIGN(DelayBasedTimeSource);
 };
 

cc/scheduler/time_source.h

-// 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.
-
-#ifndef CC_SCHEDULER_TIME_SOURCE_H_
-#define CC_SCHEDULER_TIME_SOURCE_H_
-
-#include "base/memory/ref_counted.h"
-#include "base/time/time.h"
-#include "cc/base/cc_export.h"
-
-namespace cc {
-
-class CC_EXPORT TimeSourceClient {
- public:
-  virtual void OnTimerTick() = 0;
-
- protected:
-  virtual ~TimeSourceClient() {}
-};
-
-// An generic interface for getting a reliably-ticking timesource of
-// a specified rate.
-//
-// Be sure to call SetActive(false) before releasing your reference to the
-// timer, or it will keep on ticking!
-class CC_EXPORT TimeSource : public base::RefCounted<TimeSource> {
- public:
-  virtual void SetClient(TimeSourceClient* client) = 0;
-
-  // If transitioning from not active to active, SetActive will return the
-  // timestamp of the most recenly missed tick that did not have OnTimerTick
-  // called.
-  virtual base::TimeTicks SetActive(bool active) = 0;
-
-  virtual bool Active() const = 0;
-  virtual void SetTimebaseAndInterval(base::TimeTicks timebase,
-                                      base::TimeDelta interval) = 0;
-  virtual base::TimeTicks LastTickTime() const = 0;
-  virtual base::TimeTicks NextTickTime() const = 0;
-
- protected:
-  virtual ~TimeSource() {}
-
- private:
-  friend class base::RefCounted<TimeSource>;
-};
-
-}  // namespace cc
-
-#endif  // CC_SCHEDULER_TIME_SOURCE_H_