Chromecast: split DummyMediaTaskRunner class into its own file.

- also rename class to SimpleMediaTaskRunner

BUG= internal b/18865809

Review URL: https://codereview.chromium.org/1161163003

Cr-Commit-Position: refs/heads/master@{#333163}

chromecast/media/cma/base/simple_media_task_runner.cc

+// Copyright 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 "chromecast/media/cma/base/simple_media_task_runner.h"
+
+#include "base/single_thread_task_runner.h"
+
+namespace chromecast {
+namespace media {
+
+SimpleMediaTaskRunner::SimpleMediaTaskRunner(
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
+    : task_runner_(task_runner) {
+}
+
+SimpleMediaTaskRunner::~SimpleMediaTaskRunner() {
+}
+
+bool SimpleMediaTaskRunner::PostMediaTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    base::TimeDelta timestamp) {
+  return task_runner_->PostTask(from_here, task);
+}
+
+}  // namespace media
+}  // namespace chromecast

chromecast/media/cma/base/simple_media_task_runner.h

+// Copyright 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.
+
+#ifndef CHROMECAST_MEDIA_CMA_BASE_SIMPLE_MEDIA_TASK_RUNNER_H_
+#define CHROMECAST_MEDIA_CMA_BASE_SIMPLE_MEDIA_TASK_RUNNER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "chromecast/media/cma/base/media_task_runner.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
+
+namespace chromecast {
+namespace media {
+
+// This is a light version of task runner which post tasks immediately
+// by ignoring the timestamps once receiving the request.
+class SimpleMediaTaskRunner : public MediaTaskRunner {
+ public:
+  SimpleMediaTaskRunner(
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
+
+  // MediaTaskRunner implementation.
+  bool PostMediaTask(const tracked_objects::Location& from_here,
+                     const base::Closure& task,
+                     base::TimeDelta timestamp) override;
+
+ private:
+  ~SimpleMediaTaskRunner() override;
+
+  scoped_refptr<base::SingleThreadTaskRunner> const task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(SimpleMediaTaskRunner);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_BASE_SIMPLE_MEDIA_TASK_RUNNER_H_

chromecast/media/cma/filters/demuxer_stream_adapter.cc

@@ -10,7 +10,7 @@
 #include "chromecast/media/cma/base/balanced_media_task_runner_factory.h"
 #include "chromecast/media/cma/base/cma_logging.h"
 #include "chromecast/media/cma/base/decoder_buffer_adapter.h"
-#include "chromecast/media/cma/base/media_task_runner.h"
+#include "chromecast/media/cma/base/simple_media_task_runner.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/buffers.h"
 #include "media/base/decoder_buffer.h"
@@ -19,52 +19,14 @@
 namespace chromecast {
 namespace media {
 
-namespace {
-
-class DummyMediaTaskRunner : public MediaTaskRunner {
- public:
-  DummyMediaTaskRunner(
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
-
-  // MediaTaskRunner implementation.
-  bool PostMediaTask(
-      const tracked_objects::Location& from_here,
-      const base::Closure& task,
-      base::TimeDelta timestamp) override;
-
- private:
-  ~DummyMediaTaskRunner() override;
-
-  scoped_refptr<base::SingleThreadTaskRunner> const task_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(DummyMediaTaskRunner);
-};
-
-DummyMediaTaskRunner::DummyMediaTaskRunner(
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
-  : task_runner_(task_runner) {
-}
-
-DummyMediaTaskRunner::~DummyMediaTaskRunner() {
-}
-
-bool DummyMediaTaskRunner::PostMediaTask(
-    const tracked_objects::Location& from_here,
-    const base::Closure& task,
-    base::TimeDelta timestamp) {
-  return task_runner_->PostTask(from_here, task);
-}
-
-}  // namespace
-
 DemuxerStreamAdapter::DemuxerStreamAdapter(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     const scoped_refptr<BalancedMediaTaskRunnerFactory>&
-    media_task_runner_factory,
+        media_task_runner_factory,
     ::media::DemuxerStream* demuxer_stream)
     : task_runner_(task_runner),
       media_task_runner_factory_(media_task_runner_factory),
-      media_task_runner_(new DummyMediaTaskRunner(task_runner)),
+      media_task_runner_(new SimpleMediaTaskRunner(task_runner)),
       demuxer_stream_(demuxer_stream),
       is_pending_read_(false),
       is_pending_demuxer_read_(false),

chromecast/media/media.gyp

@@ -108,6 +108,8 @@
         'cma/base/decoder_config_adapter.h',
         'cma/base/media_task_runner.cc',
         'cma/base/media_task_runner.h',
+        'cma/base/simple_media_task_runner.cc',
+        'cma/base/simple_media_task_runner.h',         
       ],
     },
     {