Check whether ScriptResource is still loading due to revalidation

third_party/WebKit/Source/core/dom/PendingScript.cpp

Index: third_party/WebKit/Source/core/dom/PendingScript.cpp
diff --git a/third_party/WebKit/Source/core/dom/PendingScript.cpp b/third_party/WebKit/Source/core/dom/PendingScript.cpp
index 7ea074252620e6ed402a035c3bbe8bfceba0d48e..cdcf29482b4339a0fba0515ad7b81af7437d1ae7 100644
--- a/third_party/WebKit/Source/core/dom/PendingScript.cpp
+++ b/third_party/WebKit/Source/core/dom/PendingScript.cpp
@@ -221,13 +221,19 @@ DEFINE_TRACE(PendingScript) {
   MemoryCoordinatorClient::trace(visitor);
 }
 
-ScriptSourceCode PendingScript::getSource(const KURL& documentURL,
-                                          bool& errorOccurred) const {
+NOINLINE ScriptSourceCode PendingScript::getSource(const KURL& documentURL,
+                                                   bool& errorOccurred) const {
   checkState();
 
   errorOccurred = this->errorOccurred();
   if (resource()) {
-    DCHECK(resource()->isLoaded());
+    // For investigating https://crbug.com/692856.
+    CHECK(resource()->isLoaded() ||
+          (resource()->isLoading() && resource()->hasRevalidated()));
+    CHECK(resource()->isLoaded() ||
+          (resource()->isLoading() && resource()->isCacheValidator()));
+    CHECK(resource()->isLoaded());
+
     if (m_streamer && !m_streamer->streamingSuppressed())
       return ScriptSourceCode(m_streamer, resource());
     return ScriptSourceCode(resource());