Unit Test for the fix for history.replaceState navigations submitted earlier.

Unit test for the fix submitted with https://codereview.chromium.org/316553007

BUG=375921

Review URL: https://codereview.chromium.org/316403004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276770 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/web_contents/web_contents_view_aura_browsertest.cc

@@ -555,6 +555,34 @@ IN_PROC_BROWSER_TEST_F(WebContentsViewAuraTest,
   EXPECT_EQ(NULL, screenshot_manager()->screenshot_taken_for());
 }
 
+// Tests that navigations resulting from reloads and history.replaceState
+// do not capture screenshots while navigations resulting from
+// histrory.pushState do.
+IN_PROC_BROWSER_TEST_F(WebContentsViewAuraTest, ReplaceStateReloadPushState) {
+  ASSERT_NO_FATAL_FAILURE(
+      StartTestWithPage("files/overscroll_navigation.html"));
+  WebContentsImpl* web_contents =
+      static_cast<WebContentsImpl*>(shell()->web_contents());
+  RenderFrameHost* main_frame = web_contents->GetMainFrame();
+
+  set_min_screenshot_interval(0);
+  screenshot_manager()->Reset();
+  ExecuteSyncJSFunction(main_frame, "use_replace_state()");
+  screenshot_manager()->WaitUntilScreenshotIsReady();
+  // history.replaceState shouldn't capture a screenshot
+  EXPECT_FALSE(screenshot_manager()->screenshot_taken_for());
+  screenshot_manager()->Reset();
+  web_contents->GetController().Reload(true);
+  WaitForLoadStop(web_contents);
+  // reloading the page shouldn't capture a screenshot
+  EXPECT_FALSE(screenshot_manager()->screenshot_taken_for());
+  screenshot_manager()->Reset();
+  ExecuteSyncJSFunction(main_frame, "use_push_state()");
+  screenshot_manager()->WaitUntilScreenshotIsReady();
+  // pushing a state should capture a screenshot
+  EXPECT_TRUE(screenshot_manager()->screenshot_taken_for());
+}
+
 // TODO(sadrul): This test is disabled because it reparents in a way the
 //               FocusController does not support. This code would crash in
 //               a production build. It only passed prior to this revision

content/test/data/overscroll_navigation.html

@@ -57,6 +57,14 @@ function uninstall_touch_handler() {
   document.removeEventListener('touchstart', touch_start_handler);
 }
 
+function use_replace_state() {
+  window.history.replaceState({}, 'foo');
+}
+
+function use_push_state() {
+  window.history.pushState({}, 'foo2');
+}
+
 onload = function() {
   window.onhashchange = function() {
     document.title = "Title: " + location.hash;