Support for defered media load to cast_content_render_client.

chromecast/renderer/cast_media_load_deferrer.h

Index: chromecast/renderer/cast_media_load_deferrer.h
diff --git a/chromecast/renderer/cast_media_load_deferrer.h b/chromecast/renderer/cast_media_load_deferrer.h
new file mode 100644
index 0000000000000000000000000000000000000000..5a66ab9e4d03edcbe4c5f39f37879106a0a86ecf
--- /dev/null
+++ b/chromecast/renderer/cast_media_load_deferrer.h
@@ -0,0 +1,35 @@
+// Copyright 2014 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_RENDERER_CAST_MEDIA_LOAD_DEFERRER_H_
+#define CHROMECAST_RENDERER_CAST_MEDIA_LOAD_DEFERRER_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "content/public/renderer/render_frame_observer.h"
+
+namespace chromecast {
+
+// Defers media player loading in background web apps until brought into
+// foreground.
+class CastMediaLoadDeferrer : public content::RenderFrameObserver {
+ public:
+  // Will run |closure| to continue loading the media resource once the page is
+  // swapped in.
+  CastMediaLoadDeferrer(content::RenderFrame* render_frame,
+                        const base::Closure& closure);

[gunsch, 2014/12/22 18:25:33]

closure --> continue_loading_cb (same name as in .cc)

[derekjchow1, 2014/12/22 18:34:58]

Done.

+  virtual ~CastMediaLoadDeferrer() override;

[gunsch, 2014/12/22 18:25:33]

rm "virtual", just "override" (here and below)

[derekjchow1, 2014/12/22 18:34:58]

Done.

+
+ private:
+  // content::RenderFrameObserver implementation:
+  virtual void WasShown() override;
+
+  base::Closure continue_loading_cb_;
+
+  DISALLOW_COPY_AND_ASSIGN(CastMediaLoadDeferrer);
+};
+
+}  // namespace chromecast
+
+#endif  // CHROMECAST_RENDERER_CAST_MEDIA_LOAD_DEFERRER_H_