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

third_party/WebKit/Source/core/loader/ThreadableLoaderTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/loader/ThreadableLoader.h"
 
 #include "core/dom/ExecutionContextTask.h"
 #include "core/fetch/MemoryCache.h"
 #include "core/fetch/ResourceLoaderOptions.h"
 #include "core/loader/DocumentThreadableLoader.h"
@@ skipping 145 matching lines @@
 private:
     Document& document() { return m_dummyPageHolder->document(); }
 
     std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
     Checkpoint m_checkpoint;
     Persistent<DocumentThreadableLoader> m_loader;
 };
 
 class WorkerThreadableLoaderTestHelper : public ThreadableLoaderTestHelper, public WorkerLoaderProxyProvider {
 public:
-    WorkerThreadableLoaderTestHelper(BlinkGC::ThreadHeapMode threadHeapMode)
+    explicit WorkerThreadableLoaderTestHelper(BlinkGC::ThreadHeapMode threadHeapMode)
         : m_dummyPageHolder(DummyPageHolder::create(IntSize(1, 1)))
         , m_threadHeapMode(threadHeapMode)
     {
     }
 
     void createLoader(ThreadableLoaderClient* client, CrossOriginRequestPolicy crossOriginRequestPolicy) override
     {
         std::unique_ptr<WaitableEvent> completionEvent = wrapUnique(new WaitableEvent());
         postTaskToWorkerGlobalScope(BLINK_FROM_HERE,
             createCrossThreadTask(
@@ skipping 705 matching lines @@
     // test is not saying that didFailAccessControlCheck should be dispatched
     // synchronously, but is saying that even when a response is served
     // synchronously it should not lead to a crash.
     startLoader(KURL(KURL(), "about:blank"));
     callCheckpoint(2);
 }
 
 } // namespace
 
 } // namespace blink