Add explicit to core/fetch, core/loader and modules/websockets

third_party/WebKit/Source/core/fetch/RawResourceTest.cpp

Index: third_party/WebKit/Source/core/fetch/RawResourceTest.cpp
diff --git a/third_party/WebKit/Source/core/fetch/RawResourceTest.cpp b/third_party/WebKit/Source/core/fetch/RawResourceTest.cpp
index bd233a640256039f2349318284815ca6029b4a8e..689d0dde55e51b2efaed24ffa2f77b08b9a775db 100644
--- a/third_party/WebKit/Source/core/fetch/RawResourceTest.cpp
+++ b/third_party/WebKit/Source/core/fetch/RawResourceTest.cpp
@@ -357,7 +357,7 @@ TEST(RawResourceTest, AddClientDuringCallback)
 class RemovingClient : public GarbageCollectedFinalized<RemovingClient>, public RawResourceClient {
     USING_GARBAGE_COLLECTED_MIXIN(RemovingClient);
 public:
-    RemovingClient(DummyClient* client)
+    explicit RemovingClient(DummyClient* client)
         : m_dummyClient(client) {}
 
     ~RemovingClient() override {}