[Fetch] Cleanup unused methods

Source/modules/fetch/FetchManager.cpp

 // Copyright 2014 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 "config.h"
 #include "modules/fetch/FetchManager.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
@@ skipping 32 matching lines @@
     ~Loader() override;
     DECLARE_VIRTUAL_TRACE();
 
     void didReceiveResponse(unsigned long, const ResourceResponse&, PassOwnPtr<WebDataConsumerHandle>) override;
     void didFinishLoading(unsigned long, double) override;
     void didFail(const ResourceError&) override;
     void didFailAccessControlCheck(const ResourceError&) override;
     void didFailRedirectCheck() override;
 
     void start();
-    void cancel();
     void dispose();
 
 private:
     Loader(ExecutionContext*, FetchManager*, PassRefPtrWillBeRawPtr<ScriptPromiseResolver>, FetchRequestData*);
 
     void performBasicFetch();
     void performNetworkError(const String& message);
     void performHTTPFetch(bool corsFlag, bool corsPreflightFlag);
     void failed(const String& message);
     void notifyFinished();
@@ skipping 186 matching lines @@
     }
 
     // "- Otherwise
     //     Set |request|'s response tainting to |CORS|."
     m_request->setResponseTainting(FetchRequestData::CORSTainting);
     // "The result of performing an HTTP fetch using |request| with the
     // |CORS flag| set."
     performHTTPFetch(true, false);
 }
 
-void FetchManager::Loader::cancel()
-{
-    m_finished = true;
-    if (m_loader) {
-        m_loader->cancel();
-        m_loader.clear();
-    }
-    if (m_resolver) {
-        // Note: In the current implementation this branch is never taken
-        // because this function can be called only through the body stream.
-        ScriptState* scriptState = m_resolver->scriptState();
-        ScriptState::Scope scope(scriptState);
-        m_resolver->reject(V8ThrowException::createTypeError(scriptState->isolate(), "fetch is cancelled"));
-        m_resolver.clear();
-    }
-
-    notifyFinished();
-}
-
 void FetchManager::Loader::dispose()
 {
     // Prevent notification
     m_fetchManager = nullptr;
     if (m_loader) {
         m_loader->cancel();
         m_loader.clear();
     }
 }
 
@@ skipping 161 matching lines @@
 
 DEFINE_TRACE(FetchManager)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_executionContext);
     visitor->trace(m_loaders);
 #endif
 }
 
 } // namespace blink