Encrypted Media: Implement IPC based SetCdm().

content/renderer/media/webcontentdecryptionmodule_impl.h

Index: content/renderer/media/webcontentdecryptionmodule_impl.h
diff --git a/content/renderer/media/webcontentdecryptionmodule_impl.h b/content/renderer/media/webcontentdecryptionmodule_impl.h
index 6ec3a95e30a8d21e029f45e8b990b6804610adb1..ef3bb75545aabee7fe31a979dc63090c745a6add 100644
--- a/content/renderer/media/webcontentdecryptionmodule_impl.h
+++ b/content/renderer/media/webcontentdecryptionmodule_impl.h
@@ -36,16 +36,31 @@ class WebContentDecryptionModuleImpl
   // after WebContentDecryptionModule is freed. http://crbug.com/330324
   media::Decryptor* GetDecryptor();
 
+#if defined(OS_ANDROID)
+  // Returns the CDM ID associated with this object. May be kInvalidCdmId if no
+  // CDM ID is associated.
+  int GetCdmId();
+#endif  // defined(OS_ANDROID)
+
   // blink::WebContentDecryptionModule implementation.
   virtual blink::WebContentDecryptionModuleSession* createSession(
       blink::WebContentDecryptionModuleSession::Client* client);
 
  private:
   // Takes reference to |adapter|.
+#if defined(OS_ANDROID)
+  WebContentDecryptionModuleImpl(scoped_refptr<CdmSessionAdapter> adapter,
+                                 int cdm_id);
+#else
   WebContentDecryptionModuleImpl(scoped_refptr<CdmSessionAdapter> adapter);
+#endif
 
   scoped_refptr<CdmSessionAdapter> adapter_;
 
+#if defined(OS_ANDROID)
+  int cdm_id_;
+#endif  // defined(OS_ANDROID)
+
   DISALLOW_COPY_AND_ASSIGN(WebContentDecryptionModuleImpl);
 };