Avoid mutating frame unique name after first real commit.

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

Index: third_party/WebKit/Source/web/tests/WebFrameTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
index ae3e9cf891a4b7e0b65b18344b50d90188858ef4..c034e88a5a595c185c68d5d6fa2f8df8579871c5 100644
--- a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
@@ -7599,9 +7599,10 @@ TEST_F(WebFrameSwapTest, UniqueNameAfterRemoteToLocalSwap)
     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);