Assert that |resource| is always non-null in requestPendingScript()

third_party/WebKit/Source/core/html/parser/HTMLParserScriptRunner.cpp

Index: third_party/WebKit/Source/core/html/parser/HTMLParserScriptRunner.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/HTMLParserScriptRunner.cpp b/third_party/WebKit/Source/core/html/parser/HTMLParserScriptRunner.cpp
index ec9bf4e0b0aeeb1b11ffec9f2810ff442bf01a7b..88afa39d916a2a36115136ef176f2b1000c90df6 100644
--- a/third_party/WebKit/Source/core/html/parser/HTMLParserScriptRunner.cpp
+++ b/third_party/WebKit/Source/core/html/parser/HTMLParserScriptRunner.cpp
@@ -580,13 +580,11 @@ void HTMLParserScriptRunner::requestDeferredScript(Element* element) {
 
 PendingScript* HTMLParserScriptRunner::requestPendingScript(
     Element* element) const {
-  // This should correctly return 0 for empty or invalid srcValues.
   ScriptResource* resource = toScriptLoaderIfPossible(element)->resource();
-  if (!resource) {
-    DVLOG(1) << "Not implemented.";  // Dispatch error event.
-    return nullptr;
-  }
-
+  // Here |resource| should be non-null. If it were nullptr,
+  // ScriptLoader::fetchScript() should have returned false and
+  // thus the control shouldn't have reached here.
+  CHECK(resource);
   return PendingScript::create(element, resource);
 }