Remove default key slot from KeygenHandler.

android_webview/browser/aw_resource_context.h

Index: android_webview/browser/aw_resource_context.h
diff --git a/android_webview/browser/aw_resource_context.h b/android_webview/browser/aw_resource_context.h
index fdec09358e5ee26263bd6db497514aed262a39fd..c6256cc36fbc4d15a5a6b6b3cce35653f2f3bc9b 100644
--- a/android_webview/browser/aw_resource_context.h
+++ b/android_webview/browser/aw_resource_context.h
@@ -28,6 +28,12 @@ class AwResourceContext : public content::ResourceContext {
   // content::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;