Don't reuse HistoryItems for multiple navigations

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 2973 matching lines @@
     {
         m_frame->reloadWithOverrideURL(m_url, m_ignoreCache);
     }
 
 private:
     WebFrame* const m_frame;
     const KURL m_url;
     const bool m_ignoreCache;
 };
 
+class ClearScrollStateOnCommitWebFrameClient : public FrameTestHelpers::TestWebFrameClient {
+public:
+    void didCommitProvisionalLoad(WebLocalFrame* frame, const WebHistoryItem&, WebHistoryCommitType) override
+    {
+        frame->view()->resetScrollAndScaleState();
+    }
+};
+
 TEST_F(WebFrameTest, ReloadWithOverrideURLPreservesState)
 {
     const std::string firstURL = "200-by-300.html";
     const std::string secondURL = "content-width-1000.html";
     const std::string thirdURL = "very_tall_div.html";
     const float pageScaleFactor = 1.1684f;
     const int pageWidth = 120;
     const int pageHeight = 100;
 
     registerMockedHttpURLLoad(firstURL);
     registerMockedHttpURLLoad(secondURL);
     registerMockedHttpURLLoad(thirdURL);
 
     FrameTestHelpers::WebViewHelper webViewHelper;
-    webViewHelper.initializeAndLoad(m_baseURL + firstURL, true);
+    ClearScrollStateOnCommitWebFrameClient client;
+    webViewHelper.initializeAndLoad(m_baseURL + firstURL, true, &client);
     webViewHelper.webViewImpl()->resize(WebSize(pageWidth, pageHeight));
     webViewHelper.webViewImpl()->mainFrame()->setScrollOffset(WebSize(pageWidth / 4, pageHeight / 4));
     webViewHelper.webViewImpl()->setPageScaleFactor(pageScaleFactor);
 
     WebSize previousOffset = webViewHelper.webViewImpl()->mainFrame()->scrollOffset();
     float previousScale = webViewHelper.webViewImpl()->pageScaleFactor();
 
-    // Reload the page using the cache.
+    // Reload the page and end up at the same url. State should be propagated.
     Platform::current()->currentThread()->postTask(
-        FROM_HERE, new ReloadWithOverrideURLTask(webViewHelper.webViewImpl()->mainFrame(), toKURL(m_baseURL + secondURL), false));
+        FROM_HERE, new ReloadWithOverrideURLTask(webViewHelper.webViewImpl()->mainFrame(), toKURL(m_baseURL + firstURL), false));
     FrameTestHelpers::pumpPendingRequestsDoNotUse(webViewHelper.webViewImpl()->mainFrame());
     EXPECT_EQ(previousOffset.width, webViewHelper.webViewImpl()->mainFrame()->scrollOffset().width);
     EXPECT_EQ(previousOffset.height, webViewHelper.webViewImpl()->mainFrame()->scrollOffset().height);
     EXPECT_EQ(previousScale, webViewHelper.webViewImpl()->pageScaleFactor());
 
-    // Reload the page while ignoring the cache.
+    // Reload the page using the cache. State should not be propagated.
+    Platform::current()->currentThread()->postTask(
+        FROM_HERE, new ReloadWithOverrideURLTask(webViewHelper.webViewImpl()->mainFrame(), toKURL(m_baseURL + secondURL), false));
+    FrameTestHelpers::pumpPendingRequestsDoNotUse(webViewHelper.webViewImpl()->mainFrame());
+    EXPECT_EQ(0, webViewHelper.webViewImpl()->mainFrame()->scrollOffset().width);
+    EXPECT_EQ(0, webViewHelper.webViewImpl()->mainFrame()->scrollOffset().height);
+    EXPECT_EQ(1.0f, webViewHelper.webViewImpl()->pageScaleFactor());
+
+    // Reload the page while ignoring the cache. State should not be propagated.
     Platform::current()->currentThread()->postTask(
         FROM_HERE, new ReloadWithOverrideURLTask(webViewHelper.webViewImpl()->mainFrame(), toKURL(m_baseURL + thirdURL), true));
     FrameTestHelpers::pumpPendingRequestsDoNotUse(webViewHelper.webViewImpl()->mainFrame());
-    EXPECT_EQ(previousOffset.width, webViewHelper.webViewImpl()->mainFrame()->scrollOffset().width);
-    EXPECT_EQ(previousOffset.height, webViewHelper.webViewImpl()->mainFrame()->scrollOffset().height);
-    EXPECT_EQ(previousScale, webViewHelper.webViewImpl()->pageScaleFactor());
+    EXPECT_EQ(0, webViewHelper.webViewImpl()->mainFrame()->scrollOffset().width);
+    EXPECT_EQ(0, webViewHelper.webViewImpl()->mainFrame()->scrollOffset().height);
+    EXPECT_EQ(1.0f, webViewHelper.webViewImpl()->pageScaleFactor());
 }
 
 TEST_F(WebFrameTest, ReloadWhileProvisional)
 {
     // Test that reloading while the previous load is still pending does not cause the initial
     // request to get lost.
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initialize();
@@ skipping 4294 matching lines @@
 
     EXPECT_EQ(parent, firstFrame->parent());
     EXPECT_EQ(parent, secondFrame->parent());
     EXPECT_EQ(parent, thirdFrame->parent());
     EXPECT_EQ(parent, fourthFrame->parent());
 
     view->close();
 }
 
 } // namespace blink