Remove default key slot from KeygenHandler.

content/public/test/mock_resource_context.h

Index: content/public/test/mock_resource_context.h
diff --git a/content/public/test/mock_resource_context.h b/content/public/test/mock_resource_context.h
index 8f1791a5f8bb9b7b2e0746409ce1ff47280590ef..72cf22b2de9ad9edb942deecbec2bb0a9223ccaf 100644
--- a/content/public/test/mock_resource_context.h
+++ b/content/public/test/mock_resource_context.h
@@ -28,6 +28,12 @@ class MockResourceContext : public ResourceContext {
   // ResourceContext implementation:
   virtual net::HostResolver* GetHostResolver() OVERRIDE;
   virtual net::URLRequestContext* GetRequestContext() OVERRIDE;
+  virtual void CreateKeygenHandler(
+      uint32 key_size_in_bits,
+      const std::string& challenge_string,
+      const GURL& url,
+      const base::Callback<void(scoped_ptr<net::KeygenHandler>)>& callback)
+      OVERRIDE;
   virtual bool AllowMicAccess(const GURL& origin) OVERRIDE;
   virtual bool AllowCameraAccess(const GURL& origin) OVERRIDE;