Extract requestMediaKeySystemAccess() algorithm.

media/blink/webcontentdecryptionmoduleaccess_impl.h

Index: media/blink/webcontentdecryptionmoduleaccess_impl.h
diff --git a/media/blink/webcontentdecryptionmoduleaccess_impl.h b/media/blink/webcontentdecryptionmoduleaccess_impl.h
index 131bb21e6a8333bef72a3e39b39f92226f6aedd9..a70fca215bb3daa94647a50270311ae21f2d5002 100644
--- a/media/blink/webcontentdecryptionmoduleaccess_impl.h
+++ b/media/blink/webcontentdecryptionmoduleaccess_impl.h
@@ -5,18 +5,12 @@
 #ifndef MEDIA_BLINK_WEBCONTENTDECRYPTIONMODULEACCESS_IMPL_H_
 #define MEDIA_BLINK_WEBCONTENTDECRYPTIONMODULEACCESS_IMPL_H_
 
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
-#include "media/base/cdm_factory.h"
 #include "third_party/WebKit/public/platform/WebContentDecryptionModuleAccess.h"
+#include "third_party/WebKit/public/platform/WebContentDecryptionModuleResult.h"
 #include "third_party/WebKit/public/platform/WebMediaKeySystemConfiguration.h"
+#include "third_party/WebKit/public/platform/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/platform/WebString.h"
-#include "third_party/WebKit/public/web/WebSecurityOrigin.h"
-
-namespace blink {
-class WebLocalFrame;
-}
 
 namespace media {
 
@@ -44,14 +38,14 @@ class WebContentDecryptionModuleAccessImpl
       const blink::WebSecurityOrigin& security_origin,
       const base::WeakPtr<WebEncryptedMediaClientImpl>& client);
 
-  DISALLOW_COPY_AND_ASSIGN(WebContentDecryptionModuleAccessImpl);
-
   blink::WebString key_system_;
   blink::WebMediaKeySystemConfiguration configuration_;
   blink::WebSecurityOrigin security_origin_;
 
   // Keep a WeakPtr as client is owned by render_frame_impl.
   base::WeakPtr<WebEncryptedMediaClientImpl> client_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebContentDecryptionModuleAccessImpl);
 };
 
 }  // namespace media