Avoid mutating frame unique name after first real commit.

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 7581 matching lines @@
     EXPECT_EQ(uniqueName.utf8(), WebString(remoteFrame->frame()->tree().uniqueName()).utf8());
 
     // Swap back to a LocalFrame.
     RemoteToLocalSwapWebFrameClient client(remoteFrame);
     WebLocalFrame* localFrame = WebLocalFrame::createProvisional(&client, remoteFrame, WebSandboxFlags::None);
     FrameTestHelpers::loadFrame(localFrame, m_baseURL + "subframe-hello.html");
     EXPECT_EQ(uniqueName.utf8(), localFrame->uniqueName().utf8());
     EXPECT_EQ(uniqueName.utf8(), WebString(toWebLocalFrameImpl(localFrame)->frame()->loader().currentItem()->target()).utf8());
 
     // Repeat with no name on the frame.
+    // (note that uniqueName is immutable after first real commit).
     localFrame->setName("");
     WebString uniqueName2 = localFrame->uniqueName();
-    EXPECT_EQ("<!--framePath //<!--frame2-->-->", uniqueName2.utf8());
+    EXPECT_EQ("frame1", uniqueName2.utf8());
 
     FrameTestHelpers::TestWebRemoteFrameClient remoteFrameClient2;
     WebRemoteFrameImpl* remoteFrame2 = WebRemoteFrameImpl::create(WebTreeScopeType::Document, &remoteFrameClient2);
     localFrame->swap(remoteFrame2);
     ASSERT_TRUE(mainFrame()->firstChild());
     ASSERT_EQ(mainFrame()->firstChild(), remoteFrame2);
     EXPECT_EQ(uniqueName2.utf8(), WebString(remoteFrame2->frame()->tree().uniqueName()).utf8());
 
     RemoteToLocalSwapWebFrameClient client2(remoteFrame2);
     WebLocalFrame* localFrame2 = WebLocalFrame::createProvisional(&client2, remoteFrame2, WebSandboxFlags::None);
@@ skipping 1319 matching lines @@
     FrameTestHelpers::WebViewHelper helper;
     helper.initializeAndLoad(url, true);
     Platform::current()->getURLLoaderMockFactory()->setLoaderDelegate(nullptr);
 
     Document* document = toLocalFrame(helper.webView()->page()->mainFrame())->document();
     EXPECT_TRUE(document->isImageDocument());
     EXPECT_EQ(Resource::DecodeError, toImageDocument(document)->cachedImage()->getStatus());
 }
 
 } // namespace blink