Credential Manager: Pass the correct credential type to the embedder.

public/platform/WebCredential.h

Index: public/platform/WebCredential.h
diff --git a/public/platform/WebCredential.h b/public/platform/WebCredential.h
index 6ac6571fa3948cc81c0fbd3b868e698e0cf19e02..5d3dc4bad93a40ee8eb2d594804955f62519ef87 100644
--- a/public/platform/WebCredential.h
+++ b/public/platform/WebCredential.h
@@ -17,6 +17,7 @@ class PlatformCredential;
 class WebCredential {
 public:
     BLINK_PLATFORM_EXPORT WebCredential(const WebString& id, const WebString& name, const WebURL& avatarURL);
+    BLINK_PLATFORM_EXPORT WebCredential(const WebCredential&);
     virtual ~WebCredential() { reset(); }
 
     BLINK_PLATFORM_EXPORT void assign(const WebCredential&);
@@ -26,16 +27,20 @@ public:
     BLINK_PLATFORM_EXPORT WebString name() const;
     BLINK_PLATFORM_EXPORT WebURL avatarURL() const;
 
-    BLINK_PLATFORM_EXPORT virtual bool isLocalCredential() const { return false; }
-    BLINK_PLATFORM_EXPORT virtual bool isFederatedCredential() const { return false; }
+    BLINK_PLATFORM_EXPORT bool isLocalCredential() const;
+    BLINK_PLATFORM_EXPORT bool isFederatedCredential() const;
 
 #if INSIDE_BLINK
-    BLINK_PLATFORM_EXPORT WebCredential(PlatformCredential*);
+    BLINK_PLATFORM_EXPORT static WebCredential create(PlatformCredential*);
     BLINK_PLATFORM_EXPORT WebCredential& operator=(PlatformCredential*);
     BLINK_PLATFORM_EXPORT PlatformCredential* platformCredential() const { return m_platformCredential.get(); }
 #endif
 
 protected:
+#if INSIDE_BLINK
+    BLINK_PLATFORM_EXPORT WebCredential(PlatformCredential*);
+#endif
+
     WebPrivatePtr<PlatformCredential> m_platformCredential;
 };