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 ac7d470ecb9e5bf23118158d9691a5ce82b19239..0fb4c5b00d9bb81a8346f347f9dee1bda1c98676 100644
--- a/public/web/WebFrameClient.h
+++ b/public/web/WebFrameClient.h
@@ -52,6 +52,7 @@ namespace blink {
 class WebApplicationCacheHost;
 class WebApplicationCacheHostClient;
 class WebCachedURLRequest;
+class WebContentDecryptionModule;
 class WebCookieJar;
 class WebDataSource;
 class WebDOMEvent;
@@ -90,6 +91,9 @@ public:
     virtual WebMediaPlayer* createMediaPlayer(WebFrame*, const WebURL&, WebMediaPlayerClient*) { return 0; }
 
     // May return null.
+    virtual WebContentDecryptionModule* createContentDecryptionModule(WebFrame*, const WebSecurityOrigin&, const WebString& keySystem) { return 0; }
+
+    // May return null.
     virtual WebApplicationCacheHost* createApplicationCacheHost(WebFrame*, WebApplicationCacheHostClient*) { return 0; }
 
     // May return null. Takes ownership of the client.