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

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

Index: third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp b/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
index c9e0ec66b0f1fb819d8619d26ff76cf2801b2948..eab55d4bb8f914c05f68ae89f9f985fa6c281ddd 100644
--- a/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameFetchContext.cpp
@@ -451,12 +451,22 @@ void FrameFetchContext::dispatchDidFinishLoading(unsigned long 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)