We can no longer assume that there is only one process during layout tests

content/shell/browser/webkit_test_controller.cc

Index: content/shell/browser/webkit_test_controller.cc
diff --git a/content/shell/browser/webkit_test_controller.cc b/content/shell/browser/webkit_test_controller.cc
index 2eeead8bfcf5df9eadd6041c3127a2d67be2c09d..4c0fd3203844f962387c0df4f3f03119f3378605 100644
--- a/content/shell/browser/webkit_test_controller.cc
+++ b/content/shell/browser/webkit_test_controller.cc
@@ -631,11 +631,9 @@ void WebKitTestController::OnCaptureSessionHistory() {
     WebContents* web_contents = (*window)->web_contents();
     // Only capture the history from windows in the same process as the main
     // window. During layout tests, we only use two processes when an
-    // devtools window is open. This should not happen during history navigation
-    // tests.
+    // devtools window is open.
     if (render_view_host->GetProcess() !=
         web_contents->GetRenderViewHost()->GetProcess()) {
-      NOTREACHED();
       continue;
     }
     routing_ids.push_back(web_contents->GetRenderViewHost()->GetRoutingID());