media: Introduce Renderer interface and RendererImpl.

media/base/renderer.cc

Index: media/base/renderer.cc
diff --git a/media/base/browser_cdm.cc b/media/base/renderer.cc
similarity index 68%
copy from media/base/browser_cdm.cc
copy to media/base/renderer.cc
index 2c44e1652ad09cf59125a471c051a86609347325..a4cf82ca543a0b444ab49302ff15eca91700b6c4 100644
--- a/media/base/browser_cdm.cc
+++ b/media/base/renderer.cc
@@ -2,14 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "media/base/browser_cdm.h"
+#include "media/base/renderer.h"
 
 namespace media {
 
-BrowserCdm::BrowserCdm() {
-}
+Renderer::Renderer() {}
 
-BrowserCdm::~BrowserCdm() {
-}
+Renderer::~Renderer() {}
 
 }  // namespace media