cast: support cursor rendering for tab capture

content/browser/media/capture/cursor_renderer_dummy.h

Index: content/browser/media/capture/cursor_renderer_dummy.h
diff --git a/content/browser/media/capture/cursor_renderer_dummy.h b/content/browser/media/capture/cursor_renderer_dummy.h
new file mode 100644
index 0000000000000000000000000000000000000000..5bd35875e92fd9c93b93c2ba0f1220511fde736b
--- /dev/null
+++ b/content/browser/media/capture/cursor_renderer_dummy.h
@@ -0,0 +1,35 @@
+// Copyright (c) 2015 The Chromium Authors. All rights reserved.

[miu, 2015/10/23 01:55:13]

Suggestion: Generally, we don't write "empty" implementations for Chrome builds.
 If you think you'll need this as a no-op mock for unit testing, then consider
naming it "FakeCursorRenderer" to be consistent with other code (and only
include it in test build targets in the .gyp and .gn files).  Otherwise, IMO,
you can just delete it.

[Irfan, 2015/10/26 23:10:31]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_MEDIA_CAPTURE_CURSOR_RENDERER_DUMMY_H_
+#define CONTENT_BROWSER_MEDIA_CAPTURE_CURSOR_RENDERER_DUMMY_H_
+
+#include "content/browser/media/capture/cursor_renderer.h"
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "media/base/video_frame.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace content {
+
+class CONTENT_EXPORT CursorRendererDummy : public CursorRenderer {
+ public:
+  explicit CursorRendererDummy(gfx::NativeWindow window);
+  ~CursorRendererDummy() override;
+  void Clear() override;
+  bool Update(const gfx::Rect& region_in_frame) override;
+  void RenderOnVideoFrame(
+      const scoped_refptr<media::VideoFrame>& target) const override;
+  base::WeakPtr<CursorRenderer> GetWeakPtr() override;
+ private:

[xjz, 2015/10/22 17:08:42]

nit: one blank line above.

[Irfan, 2015/10/26 23:10:31]

doesnt exist anymore

+  base::WeakPtrFactory<CursorRendererDummy> weak_factory_;
+  DISALLOW_COPY_AND_ASSIGN(CursorRendererDummy);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_CAPTURE_CURSOR_RENDERER_DUMMY_H_