Don't swap out the old RenderFrameHost until the new one commits.

content/renderer/render_view_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/shared_memory.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 15 matching lines @@
 #include "content/public/renderer/document_state.h"
 #include "content/public/renderer/navigation_state.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/render_view_test.h"
 #include "content/public/test/test_utils.h"
 #include "content/renderer/accessibility/renderer_accessibility.h"
 #include "content/renderer/accessibility/renderer_accessibility_complete.h"
 #include "content/renderer/accessibility/renderer_accessibility_focus_only.h"
 #include "content/renderer/history_controller.h"
 #include "content/renderer/history_serialization.h"
+#include "content/renderer/render_process.h"
 #include "content/renderer/render_view_impl.h"
 #include "content/shell/browser/shell.h"
 #include "content/shell/browser/shell_browser_context.h"
 #include "content/test/frame_load_waiter.h"
 #include "content/test/mock_keyboard.h"
 #include "net/base/net_errors.h"
 #include "net/cert/cert_status_flags.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebData.h"
 #include "third_party/WebKit/public/platform/WebHTTPBody.h"
@@ skipping 444 matching lines @@
   new_view->Close();
   new_view->Release();
 }
 
 // Ensure the RenderViewImpl sends an ACK to a SwapOut request, even if it is
 // already swapped out.  http://crbug.com/93427.
 TEST_F(RenderViewImplTest, SendSwapOutACK) {
   LoadHTML("<div>Page A</div>");
   int initial_page_id = view_page_id();
 
+  // Increment the ref count so that we don't exit when swapping out.
+  RenderProcess::current()->AddRefProcess();
+
   // Respond to a swap out request.
   view()->main_render_frame()->OnSwapOut(kProxyRoutingId);
 
   // Ensure the swap out commits synchronously.
   EXPECT_NE(initial_page_id, view_page_id());
 
   // Check for a valid OnSwapOutACK.
   const IPC::Message* msg = render_thread_->sink().GetUniqueMessageMatching(
       FrameHostMsg_SwapOut_ACK::ID);
   ASSERT_TRUE(msg);
@@ skipping 1920 matching lines @@
   ProcessPendingMessages();
   base::Time after_navigation =
       base::Time::Now() + base::TimeDelta::FromDays(1);
 
   base::Time late_nav_reported_start =
       base::Time::FromDoubleT(GetMainFrame()->performance().navigationStart());
   EXPECT_LE(late_nav_reported_start, after_navigation);
 }
 
 }  // namespace content