[1/3 blink] Support redirect option of Request and "opaqueredirect" response type.

Source/modules/fetch/FetchResponseData.h

Index: Source/modules/fetch/FetchResponseData.h
diff --git a/Source/modules/fetch/FetchResponseData.h b/Source/modules/fetch/FetchResponseData.h
index 0fbffd20b9f1df7c1494341963ecd745ea4a2606..700c5a39df4ea13254e733ed9f9f8d526050456c 100644
--- a/Source/modules/fetch/FetchResponseData.h
+++ b/Source/modules/fetch/FetchResponseData.h
@@ -23,8 +23,9 @@ class MODULES_EXPORT FetchResponseData final : public GarbageCollectedFinalized<
     WTF_MAKE_NONCOPYABLE(FetchResponseData);
 public:
     // "A response has an associated type which is one of basic, CORS, default,
-    // error, and opaque. Unless stated otherwise, it is default."
-    enum Type { BasicType, CORSType, DefaultType, ErrorType, OpaqueType };
+    // error, opaque, and opaqueredirect. Unless stated otherwise, it is
+    // default."
+    enum Type { BasicType, CORSType, DefaultType, ErrorType, OpaqueType, OpaqueRedirectType };
     // "A response can have an associated termination reason which is one of
     // end-user abort, fatal, and timeout."
     enum TerminationReason { EndUserAbortTermination, FatalTermination, TimeoutTermination };
@@ -36,6 +37,7 @@ public:
     FetchResponseData* createBasicFilteredResponse();
     FetchResponseData* createCORSFilteredResponse();
     FetchResponseData* createOpaqueFilteredResponse();
+    FetchResponseData* createOpaqueRedirectFilteredResponse();
 
     FetchResponseData* clone(ExecutionContext*);