Create Pepper-based CDM for EME WD (Blink changes)

public/web/WebFrameClient.h

Index: public/web/WebFrameClient.h
diff --git a/public/web/WebFrameClient.h b/public/web/WebFrameClient.h
index c41250c4756b368ea26f48370b2479f924094fc2..eb49a52886daf2627bb3f0b3fb6996a39fca9028 100644
--- a/public/web/WebFrameClient.h
+++ b/public/web/WebFrameClient.h
@@ -53,6 +53,7 @@ namespace blink {
 class WebApplicationCacheHost;
 class WebApplicationCacheHostClient;
 class WebCachedURLRequest;
+class WebContentDecryptionModule;
 class WebCookieJar;
 class WebDataSource;
 class WebDOMEvent;
@@ -90,6 +91,9 @@ public:
     virtual WebMediaPlayer* createMediaPlayer(WebLocalFrame*, const WebURL&, WebMediaPlayerClient*) { return 0; }
 
     // May return null.
+    virtual WebContentDecryptionModule* createContentDecryptionModule(WebLocalFrame*, const WebSecurityOrigin&, const WebString& keySystem) { return 0; }
+
+    // May return null.
     virtual WebApplicationCacheHost* createApplicationCacheHost(WebLocalFrame*, WebApplicationCacheHostClient*) { return 0; }
 
     // May return null. Takes ownership of the client.