[Fetch] Omit console error messages for cancellation, timeout, and non-BlinkInternal

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 177 matching lines @@
     ASSERT(m_responseBuffer);
     ASSERT(!m_failed);
     m_responseBuffer->close();
     m_responseBuffer.clear();
     m_finished = true;
     notifyFinished();
 }
 
 void FetchManager::Loader::didFail(const ResourceError& error)
 {
-    failed("Fetch API cannot load " + error.failingURL() + ". " + error.localizedDescription());
+    if (error.isCancellation() || error.isTimeout() || error.domain() != errorDomainBlinkInternal)
+        failed(String());
+    else
+        failed("Fetch API cannot load " + error.failingURL() + ". " + error.localizedDescription());
 }
 
 void FetchManager::Loader::didFailAccessControlCheck(const ResourceError& error)
 {
-    failed("Fetch API cannot load " + error.failingURL() + ". " + error.localizedDescription());
+    if (error.isCancellation() || error.isTimeout() || error.domain() != errorDomainBlinkInternal)
+        failed(String());
+    else
+        failed("Fetch API cannot load " + error.failingURL() + ". " + error.localizedDescription());
 }
 
 void FetchManager::Loader::didFailRedirectCheck()
 {
     failed("Fetch API cannot load " + m_request->url().string() + ". Redirect failed.");
 }
 
 void FetchManager::Loader::start()
 {
     // "1. If |request|'s url contains a Known HSTS Host, modify it per the
@@ skipping 209 matching lines @@
     m_loader = ThreadableLoader::create(*executionContext(), this, request, threadableLoaderOptions, resourceLoaderOptions);
     if (!m_loader)
         performNetworkError("Can't create ThreadableLoader");
 }
 
 void FetchManager::Loader::failed(const String& message)
 {
     if (m_failed || m_finished)
         return;
     m_failed = true;
-    executionContext()->addConsoleMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, message));
+    if (!message.isEmpty())
+        executionContext()->addConsoleMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, message));
     if (m_responseBuffer) {
         m_responseBuffer->error(DOMException::create(NetworkError, "Failed to fetch"));
         m_responseBuffer.clear();
     } else if (m_resolver) {
         if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped())
             return;
         ScriptState* state = m_resolver->scriptState();
         ScriptState::Scope scope(state);
         m_resolver->reject(V8ThrowException::createTypeError(state->isolate(), "Failed to fetch"));
     }
@@ skipping 51 matching lines @@
 
 DEFINE_TRACE(FetchManager)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_executionContext);
     visitor->trace(m_loaders);
 #endif
 }
 
 } // namespace blink