Don't reuse HistoryItems for multiple navigations

Source/web/tests/WebViewTest.cpp

Index: Source/web/tests/WebViewTest.cpp
diff --git a/Source/web/tests/WebViewTest.cpp b/Source/web/tests/WebViewTest.cpp
index 0361490b837500926e9007fa9139a8f2227723f2..c5f95fae36e3fdbca167dc05ce91d5becb73756e 100644
--- a/Source/web/tests/WebViewTest.cpp
+++ b/Source/web/tests/WebViewTest.cpp
@@ -1169,13 +1169,11 @@ TEST_F(WebViewTest, HistoryResetScrollAndScaleState)
     EXPECT_EQ(111, mainFrameLocal->loader().currentItem()->scrollPoint().y());
 
     // Confirm that resetting the page state resets the saved scroll position.
-    // The HistoryController treats a page scale factor of 0.0f as special and avoids
-    // restoring it to the WebView.
     webViewImpl->resetScrollAndScaleState();
     EXPECT_EQ(1.0f, webViewImpl->pageScaleFactor());
     EXPECT_EQ(0, webViewImpl->mainFrame()->scrollOffset().width);
     EXPECT_EQ(0, webViewImpl->mainFrame()->scrollOffset().height);
-    EXPECT_EQ(0.0f, mainFrameLocal->loader().currentItem()->pageScaleFactor());
+    EXPECT_EQ(1.0f, mainFrameLocal->loader().currentItem()->pageScaleFactor());
     EXPECT_EQ(0, mainFrameLocal->loader().currentItem()->scrollPoint().x());
     EXPECT_EQ(0, mainFrameLocal->loader().currentItem()->scrollPoint().y());
 }