Add ELEMENT_TYPE_WEBSOCKET to subresource filter

content/shell/test_runner/mock_web_document_subresource_filter.h

Index: content/shell/test_runner/mock_web_document_subresource_filter.h
diff --git a/content/shell/test_runner/mock_web_document_subresource_filter.h b/content/shell/test_runner/mock_web_document_subresource_filter.h
index 780d1dd5bc63ad35330e6f586577cf4e57fd2b17..77b996c0e613b7a235c62899cbc296cb5ca6b8d6 100644
--- a/content/shell/test_runner/mock_web_document_subresource_filter.h
+++ b/content/shell/test_runner/mock_web_document_subresource_filter.h
@@ -28,9 +28,12 @@ class MockWebDocumentSubresourceFilter
   // blink::WebDocumentSubresourceFilter:
   LoadPolicy getLoadPolicy(const blink::WebURL& resource_url,
                            blink::WebURLRequest::RequestContext) override;
+  LoadPolicy getLoadPolicyForWebSocketConnect(
+      const blink::WebURL& url) override;
   void reportDisallowedLoad() override;
 
  private:
+  LoadPolicy getLoadPolicyImpl(const blink::WebURL& url);
   std::vector<std::string> disallowed_path_suffixes_;
 
   DISALLOW_COPY_AND_ASSIGN(MockWebDocumentSubresourceFilter);