[ImageLoader 2d] Set DecodeError by calling ResourceLoader::cancel()

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

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 433 matching lines @@
       "devtools.timeline", "ResourceFinish", TRACE_EVENT_SCOPE_THREAD, "data",
       InspectorResourceFinishEvent::data(identifier, finishTime, false));
   InspectorInstrumentation::didFinishLoading(frame(), identifier, finishTime,
                                              encodedDataLength);
   if (frame()->frameScheduler())
     frame()->frameScheduler()->didStopLoading(identifier);
 }
 
 void FrameFetchContext::dispatchDidFail(unsigned long identifier,
                                         const ResourceError& error,
-                                        bool isInternalRequest) {
+                                        bool isInternalRequest,
+                                        bool isDecodeError) {
   frame()->loader().progress().completeProgress(identifier);
   TRACE_EVENT_INSTANT1("devtools.timeline", "ResourceFinish",
                        TRACE_EVENT_SCOPE_THREAD, "data",
                        InspectorResourceFinishEvent::data(identifier, 0, true));
-  InspectorInstrumentation::didFailLoading(frame(), identifier, error);
+  if (isDecodeError) {
+    // In case of DecodeError, pretend as load finish only to inspector, in
+    // order to let inspector to
+    // - show the contents of the Resource, and
+    // - show the Resource in the resources tree.
+    InspectorInstrumentation::didFinishLoading(
+        frame(), identifier, 0, WebURLLoaderClient::kUnknownEncodedDataLength);
+  } else {
+    InspectorInstrumentation::didFailLoading(frame(), identifier, error);
+  }
   // Notification to FrameConsole should come AFTER InspectorInstrumentation
   // call, DevTools front-end relies on this.
   if (!isInternalRequest)
     frame()->console().didFailLoading(identifier, error);
   if (frame()->frameScheduler())
     frame()->frameScheduler()->didStopLoading(identifier);
 }
 
 void FrameFetchContext::dispatchDidLoadResourceFromMemoryCache(
     unsigned long identifier,
@@ skipping 538 matching lines @@
                                                     response);
 }
 
 DEFINE_TRACE(FrameFetchContext) {
   visitor->trace(m_document);
   visitor->trace(m_documentLoader);
   FetchContext::trace(visitor);
 }
 
 }  // namespace blink