Check whether ScriptResource is still loading due to revalidation

third_party/WebKit/Source/core/loader/resource/ScriptResource.cpp

Index: third_party/WebKit/Source/core/loader/resource/ScriptResource.cpp
diff --git a/third_party/WebKit/Source/core/loader/resource/ScriptResource.cpp b/third_party/WebKit/Source/core/loader/resource/ScriptResource.cpp
index d3be9db3a13ad3c429296b48aa9dbc0162ae9c9d..9e77ec4a7eee1f5e8819c44e281060b1fcb7ce4b 100644
--- a/third_party/WebKit/Source/core/loader/resource/ScriptResource.cpp
+++ b/third_party/WebKit/Source/core/loader/resource/ScriptResource.cpp
@@ -83,8 +83,11 @@ void ScriptResource::onMemoryDump(WebMemoryDumpLevelOfDetail levelOfDetail,
       dump->guid(), String(WTF::Partitions::kAllocatedObjectPoolName));
 }
 
-const String& ScriptResource::script() {
-  DCHECK(isLoaded());
+NOINLINE const String& ScriptResource::script() {
+  // For investigating https://crbug.com/692856.
+  CHECK(isLoaded() || (isLoading() && hasRevalidated()));
+  CHECK(isLoaded() || (isLoading() && isCacheValidator()));
+  CHECK(isLoaded());
 
   if (m_script.isNull() && data()) {
     String script = decodedText();