Introduce CdmFactory interface.

content/renderer/media/android/webmediaplayer_android.cc

Index: content/renderer/media/android/webmediaplayer_android.cc
diff --git a/content/renderer/media/android/webmediaplayer_android.cc b/content/renderer/media/android/webmediaplayer_android.cc
index e2b9e7e9c53f62be1264f3b97f4534222d6dfc22..f1032f252ef734d42eec46e7c3446e885de68980 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -25,6 +25,7 @@
 #include "content/renderer/media/android/renderer_demuxer_android.h"
 #include "content/renderer/media/android/renderer_media_player_manager.h"
 #include "content/renderer/media/crypto/key_systems.h"
+#include "content/renderer/media/crypto/render_cdm_factory.h"

[ddorwin, 2014/10/16 17:32:51]

I really dislike "Render" as a noun. It is a verb except in a few uncommon cases
that are unrelated. I would say a renderer (n) is something that renders (v).
"renderer" is also consistent with other code (i.e. l25-26 above) and the
directory name. Is there precedent for this somewhere.?

[xhwang, 2014/10/16 20:08:39]

render is used more often than renderer, e.g. render_frame_impl,
render_process_impl, render_view, render_thread...

Here's a good example of how render/renderer are used in file names:
https://code.google.com/p/chromium/codesearch#chromium/src/content/renderer/&...

[ddorwin, 2014/10/16 20:33:20]

It's about 40/60 in that directory. I would argue that Render classes are
related to rendering whereas Renderer classes are an implementation of some
interface in the renderer process (rather than the browser, GPU, etc.).

Maybe we should ask content/ owners or chromium-dev.

[xhwang, 2014/10/17 00:11:48]

I think we had this discussion before and didn't get any result... sigh

 #include "content/renderer/media/crypto/renderer_cdm_manager.h"
 #include "content/renderer/media/webcontentdecryptionmodule_impl.h"
 #include "content/renderer/render_frame_impl.h"
@@ -1521,7 +1522,7 @@ WebMediaPlayerAndroid::GenerateKeyRequestInternal(
   if (current_key_system_.empty()) {
     if (!proxy_decryptor_) {
       proxy_decryptor_.reset(new ProxyDecryptor(
-          cdm_manager_,
+          scoped_ptr<media::CdmFactory>(new RenderCdmFactory(cdm_manager_)),
           base::Bind(&WebMediaPlayerAndroid::OnKeyAdded,
                      weak_factory_.GetWeakPtr()),
           base::Bind(&WebMediaPlayerAndroid::OnKeyError,