Avoid nearly identical toImplArray() and toImplHeapArray()

Source/modules/cachestorage/CacheTest.cpp

Index: Source/modules/cachestorage/CacheTest.cpp
diff --git a/Source/modules/cachestorage/CacheTest.cpp b/Source/modules/cachestorage/CacheTest.cpp
index 5488e8bb1fd12d700ac5991422c759fa2093665a..cf1863d7b5e621c46ca6c77113a281f8f68bf4cd 100644
--- a/Source/modules/cachestorage/CacheTest.cpp
+++ b/Source/modules/cachestorage/CacheTest.cpp
@@ -552,7 +552,7 @@ TEST_F(CacheStorageTest, KeysResponseTest)
     ScriptPromise result = cache->keys(scriptState(), exceptionState());
     ScriptValue scriptValue = getResolveValue(result);
 
-    Vector<v8::Local<v8::Value>> requests = toImplArray<v8::Local<v8::Value>>(scriptValue.v8Value(), 0, isolate(), exceptionState());
+    Vector<v8::Local<v8::Value>> requests = toImplArray<Vector<v8::Local<v8::Value>>>(scriptValue.v8Value(), 0, isolate(), exceptionState());
     EXPECT_EQ(expectedUrls.size(), requests.size());
     for (int i = 0, minsize = std::min(expectedUrls.size(), requests.size()); i < minsize; ++i) {
         Request* request = V8Request::toImplWithTypeCheck(isolate(), requests[i]);
@@ -604,7 +604,7 @@ TEST_F(CacheStorageTest, MatchAllAndBatchResponseTest)
     ScriptPromise result = cache->matchAll(scriptState(), stringToRequestInfo("http://some.url/"), options, exceptionState());
     ScriptValue scriptValue = getResolveValue(result);
 
-    Vector<v8::Local<v8::Value>> responses = toImplArray<v8::Local<v8::Value>>(scriptValue.v8Value(), 0, isolate(), exceptionState());
+    Vector<v8::Local<v8::Value>> responses = toImplArray<Vector<v8::Local<v8::Value>>>(scriptValue.v8Value(), 0, isolate(), exceptionState());
     EXPECT_EQ(expectedUrls.size(), responses.size());
     for (int i = 0, minsize = std::min(expectedUrls.size(), responses.size()); i < minsize; ++i) {
         Response* response = V8Response::toImplWithTypeCheck(isolate(), responses[i]);