PlzNavigate: Remove the RequestNavigation IPC

content/browser/frame_host/navigation_controller_impl_unittest.cc

 // Copyright 2013 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/command_line.h"
 #include "base/files/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "content/browser/frame_host/cross_site_transferring_request.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/frame_host/navigation_entry_screenshot_manager.h"
+#include "content/browser/frame_host/navigation_request.h"
 #include "content/browser/frame_host/navigator.h"
+#include "content/browser/frame_host/navigator_impl.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/frame_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
@@ skipping 177 matching lines @@
   }
 
   const GURL& navigated_url() const {
     return navigated_url_;
   }
 
   NavigationControllerImpl& controller_impl() {
     return static_cast<NavigationControllerImpl&>(controller());
   }
 
-  const IPC::Message* GetLastNavigationRequest() {
+  const bool HasNavigationRequest() {
     if (base::CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kEnableBrowserSideNavigation)) {
-      return process()->sink().GetFirstMessageMatching(
-          FrameMsg_RequestNavigation::ID);
+      FrameTreeNode* root = contents()->GetFrameTree()->root();
+      NavigationRequest* navigation_request = static_cast<NavigatorImpl*>(
+          root->navigator())->GetNavigationRequestForNodeForTesting(root);
+      return navigation_request != nullptr;
     }
-    return process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID);
+    return process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID)
+        != nullptr;
   }
 
-  const GURL GetNavigationURLFromIPC(const IPC::Message* message) {
+  const GURL GetLastNavigationURL() {
     if (base::CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kEnableBrowserSideNavigation)) {
-      Tuple<CommonNavigationParams, RequestNavigationParams> nav_params;
-      FrameMsg_RequestNavigation::Read(message, &nav_params);
-      return get<0>(nav_params).url;
+      FrameTreeNode* root = contents()->GetFrameTree()->root();
+      NavigationRequest* navigation_request = static_cast<NavigatorImpl*>(
+          root->navigator())->GetNavigationRequestForNodeForTesting(root);
+      CHECK(navigation_request);
+      return navigation_request->common_params().url;
     }
+    const IPC::Message* message =
+      process()->sink().GetFirstMessageMatching(FrameMsg_Navigate::ID);
+    CHECK(message);
     Tuple<FrameMsg_Navigate_Params> nav_params;
     FrameMsg_Navigate::Read(message, &nav_params);
     return get<0>(nav_params).common_params.url;
   }
 
  protected:
   GURL navigated_url_;
   size_t navigation_entry_committed_counter_;
 };
 
@@ skipping 60 matching lines @@
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const int kNumUrls = 5;
   std::vector<GURL> urls(kNumUrls);
   for (int i = 0; i < kNumUrls; ++i) {
     urls[i] = GURL(base::StringPrintf("http://www.a.com/%d", i));
   }
 
+  main_test_rfh()->PrepareForCommit(urls[0]);

[carlosk, 2015/02/03 16:06:02]

As PrepareForCommit has ASSERTs in its implementation and I noticed this pattern
of gtest code being added to subroutines I need to mention an important FYI:
those don't behave as you think they do and they might hide failures!

See:
https://code.google.com/p/googletest/wiki/AdvancedGuide#Using_Assertions_in_S...

[clamy, 2015/02/03 16:17:09]

Interesting. I'm not planning to change that in this patch though (already big
enough).

   main_test_rfh()->SendNavigate(0, urls[0]);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
   EXPECT_EQ(urls[0], controller.GetVisibleEntry()->GetVirtualURL());
   EXPECT_FALSE(controller.CanGoBack());
   EXPECT_FALSE(controller.CanGoForward());
   EXPECT_FALSE(controller.CanGoToOffset(1));
 
   for (int i = 1; i <= 4; ++i) {
+    main_test_rfh()->PrepareForCommit(urls[i]);
     main_test_rfh()->SendNavigate(i, urls[i]);
     EXPECT_EQ(1U, navigation_entry_committed_counter_);
     navigation_entry_committed_counter_ = 0;
     EXPECT_EQ(urls[i], controller.GetVisibleEntry()->GetVirtualURL());
     EXPECT_TRUE(controller.CanGoToOffset(-i));
     EXPECT_FALSE(controller.CanGoToOffset(-(i + 1)));
     EXPECT_FALSE(controller.CanGoToOffset(1));
   }
 
   // We have loaded 5 pages, and are currently at the last-loaded page.
@@ skipping 15 matching lines @@
     GO_TO_BEGINNING,
     GO_TO_END
   };
 
   for (int test = 0; test < NUM_TESTS; ++test) {
     int offset = test_offsets[test];
     controller.GoToOffset(offset);
     url_index += offset;
     // Check that the GoToOffset will land on the expected page.
     EXPECT_EQ(urls[url_index], controller.GetPendingEntry()->GetVirtualURL());
+    main_test_rfh()->PrepareForCommit(urls[url_index]);
     main_test_rfh()->SendNavigate(url_index, urls[url_index]);
     EXPECT_EQ(1U, navigation_entry_committed_counter_);
     navigation_entry_committed_counter_ = 0;
     // Check that we can go to any valid offset into the history.
     for (size_t j = 0; j < urls.size(); ++j)
       EXPECT_TRUE(controller.CanGoToOffset(j - url_index));
     // Check that we can't go beyond the beginning or end of the history.
     EXPECT_FALSE(controller.CanGoToOffset(-(url_index + 1)));
     EXPECT_FALSE(controller.CanGoToOffset(urls.size() - url_index));
   }
@@ skipping 107 matching lines @@
   // Set the clock to always return a timestamp of 1.
   controller.SetGetTimestampCallbackForTest(
       base::Bind(&GetFixedTime, base::Time::FromInternalValue(1)));
 
   const GURL url1("http://foo1");
   const GURL url2("http://foo2");
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
 
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // Load another...
   controller.LoadURL(
       url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
 
   // Simulate the beforeunload ack for the cross-site transition, and then the
   // commit.
-  main_test_rfh()->SendBeforeUnloadACK(true);
-  main_test_rfh()->SendNavigate(1, url2);
+  main_test_rfh()->PrepareForCommit(url2);
+  contents()->GetPendingMainFrame()->SendNavigate(1, url2);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // The two loads should now be committed.
   ASSERT_EQ(controller.GetEntryCount(), 2);
 
   // Timestamps should be distinct despite the clock returning the
   // same value.
   EXPECT_EQ(1u,
             controller.GetEntryAtIndex(0)->GetTimestamp().ToInternalValue());
@@ skipping 103 matching lines @@
 TEST_F(NavigationControllerTest, LoadURL_SamePage) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const GURL url1("http://foo1");
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   EXPECT_EQ(0U, notifications.size());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   ASSERT_TRUE(controller.GetVisibleEntry());
   const base::Time timestamp = controller.GetVisibleEntry()->GetTimestamp();
   EXPECT_FALSE(timestamp.is_null());
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   EXPECT_EQ(0U, notifications.size());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // We should not have produced a new session history entry.
   EXPECT_EQ(controller.GetEntryCount(), 1);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
   EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_FALSE(controller.GetPendingEntry());
@@ skipping 19 matching lines @@
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   FrameHostMsg_DidCommitProvisionalLoad_Params params;
   params.page_id = 0;
   params.url = url1;
   params.transition = ui::PAGE_TRANSITION_TYPED;
   params.is_post = true;
   params.post_id = 123;
   params.page_state = PageState::CreateForTesting(url1, false, 0, 0);
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigateWithParams(&params);
 
   // The post data should be visible.
   NavigationEntry* entry = controller.GetVisibleEntry();
   ASSERT_TRUE(entry);
   EXPECT_TRUE(entry->GetHasPostData());
   EXPECT_EQ(entry->GetPostID(), 123);
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
 
   // We should not have produced a new session history entry.
   ASSERT_EQ(controller.GetVisibleEntry(), entry);
 
   // The post data should have been cleared due to the GET.
   EXPECT_FALSE(entry->GetHasPostData());
   EXPECT_EQ(entry->GetPostID(), 0);
 }
 
@@ skipping 70 matching lines @@
 // commits.
 TEST_F(NavigationControllerTest, LoadURL_NewPending) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   // First make an existing committed entry.
   const GURL kExistingURL1("http://eh");
   controller.LoadURL(
       kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(kExistingURL1);
   main_test_rfh()->SendNavigate(0, kExistingURL1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // Make a pending entry to somewhere new.
   const GURL kExistingURL2("http://bee");
   controller.LoadURL(
       kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   EXPECT_EQ(0U, notifications.size());
 
   // After the beforeunload but before it commits, do a new navigation.
   main_test_rfh()->PrepareForCommit(kExistingURL2);
   const GURL kNewURL("http://see");
+  main_test_rfh()->PrepareForCommit(kNewURL);
   contents()->GetMainFrame()->SendNavigate(3, kNewURL);
 
   // There should no longer be any pending entry, and the third navigation we
   // just made should be committed.
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
 }
 
 // Tests navigating to a new URL when there is a pending back/forward
 // navigation. This will happen if the user hits back, but before that commits,
 // they navigate somewhere new.
 TEST_F(NavigationControllerTest, LoadURL_ExistingPending) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   // First make some history.
   const GURL kExistingURL1("http://foo/eh");
   controller.LoadURL(
       kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(kExistingURL1);
   main_test_rfh()->SendNavigate(0, kExistingURL1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   const GURL kExistingURL2("http://foo/bee");
   controller.LoadURL(
       kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(kExistingURL2);
   main_test_rfh()->SendNavigate(1, kExistingURL2);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // Now make a pending back/forward navigation. The zeroth entry should be
   // pending.
   controller.GoBack();
   EXPECT_EQ(0U, notifications.size());
   EXPECT_EQ(0, controller.GetPendingEntryIndex());
   EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
 
   // Before that commits, do a new navigation.
   const GURL kNewURL("http://foo/see");
+  main_test_rfh()->PrepareForCommit(kNewURL);
   main_test_rfh()->SendNavigate(3, kNewURL);
 
   // There should no longer be any pending entry, and the third navigation we
   // just made should be committed.
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
 }
@@ skipping 32 matching lines @@
   controller.GoBack();
   foo_rfh->SendBeforeUnloadACK(true);
   EXPECT_EQ(0U, notifications.size());
   EXPECT_EQ(0, controller.GetPendingEntryIndex());
   EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(2, NavigationEntryImpl::FromNavigationEntry(
                 controller.GetPendingEntry())->bindings());
 
   // Before that commits, do a new navigation.
   const GURL kNewURL("http://foo/bee");
+  foo_rfh->PrepareForCommit(kNewURL);
   foo_rfh->SendNavigate(3, kNewURL);
 
   // There should no longer be any pending entry, and the third navigation we
   // just made should be committed.
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(kNewURL, controller.GetVisibleEntry()->GetURL());
   EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
                 controller.GetLastCommittedEntry())->bindings());
 }
 
 // Tests navigating to an existing URL when there is a pending new navigation.
 // This will happen if the user enters a URL, but before that commits, the
 // current page fires history.back().
 TEST_F(NavigationControllerTest, LoadURL_BackPreemptsPending) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   // First make some history.
   const GURL kExistingURL1("http://foo/eh");
   controller.LoadURL(
       kExistingURL1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(kExistingURL1);
   main_test_rfh()->SendNavigate(0, kExistingURL1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   const GURL kExistingURL2("http://foo/bee");
   controller.LoadURL(
       kExistingURL2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(kExistingURL2);
   main_test_rfh()->SendNavigate(1, kExistingURL2);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // Now make a pending new navigation.
   const GURL kNewURL("http://foo/see");
   controller.LoadURL(
       kNewURL, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   EXPECT_EQ(0U, notifications.size());
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
 
   // Before that commits, a back navigation from the renderer commits.
+  main_test_rfh()->PrepareForCommit(kExistingURL1);
   main_test_rfh()->SendNavigate(0, kExistingURL1);
 
   // There should no longer be any pending entry, and the back navigation we
   // just made should be committed.
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(kExistingURL1, controller.GetVisibleEntry()->GetURL());
 }
@@ skipping 19 matching lines @@
   controller.LoadURL(
       kNewURL, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   EXPECT_EQ(0U, notifications.size());
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(1, delegate->navigation_state_change_count());
 
   // Before that commits, a document.write and location.reload can cause the
   // renderer to send a FrameNavigate with page_id -1.
+  main_test_rfh()->PrepareForCommit(kExistingURL);
   main_test_rfh()->SendNavigate(-1, kExistingURL);
 
   // This should clear the pending entry and notify of a navigation state
   // change, so that we do not keep displaying kNewURL.
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_FALSE(controller.GetPendingEntry());
   EXPECT_EQ(-1, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(2, delegate->navigation_state_change_count());
 
   contents()->SetDelegate(NULL);
@@ skipping 163 matching lines @@
 
   // The second load should be committed, and bindings should be remembered.
   EXPECT_EQ(controller.GetEntryCount(), 2);
   EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
   EXPECT_TRUE(controller.CanGoBack());
   EXPECT_EQ(1, NavigationEntryImpl::FromNavigationEntry(
       controller.GetLastCommittedEntry())->bindings());
 
   // Going back, the first entry should still appear unprivileged.
   controller.GoBack();
-  new_rfh->SendBeforeUnloadACK(true);
+  new_rfh->PrepareForCommit(url1);
   orig_rfh->SendNavigate(0, url1);
   EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(0, NavigationEntryImpl::FromNavigationEntry(
       controller.GetLastCommittedEntry())->bindings());
 }
 
 TEST_F(NavigationControllerTest, Reload) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const GURL url1("http://foo1");
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   EXPECT_EQ(0U, notifications.size());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
   ASSERT_TRUE(controller.GetVisibleEntry());
   controller.GetVisibleEntry()->SetTitle(base::ASCIIToUTF16("Title"));
   controller.Reload(true);
   EXPECT_EQ(0U, notifications.size());
 
   const base::Time timestamp = controller.GetVisibleEntry()->GetTimestamp();
   EXPECT_FALSE(timestamp.is_null());
 
   // The reload is pending.
   EXPECT_EQ(controller.GetEntryCount(), 1);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
   EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_FALSE(controller.CanGoBack());
   EXPECT_FALSE(controller.CanGoForward());
   // Make sure the title has been cleared (will be redrawn just after reload).
   // Avoids a stale cached title when the new page being reloaded has no title.
   // See http://crbug.com/96041.
   EXPECT_TRUE(controller.GetVisibleEntry()->GetTitle().empty());
 
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // Now the reload is committed.
   EXPECT_EQ(controller.GetEntryCount(), 1);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
   EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_FALSE(controller.GetPendingEntry());
   EXPECT_FALSE(controller.CanGoBack());
   EXPECT_FALSE(controller.CanGoForward());
 
   // The timestamp should have been updated.
   ASSERT_TRUE(controller.GetVisibleEntry());
   EXPECT_GE(controller.GetVisibleEntry()->GetTimestamp(), timestamp);
 }
 
 // Tests what happens when a reload navigation produces a new page.
 TEST_F(NavigationControllerTest, Reload_GeneratesNewPage) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const GURL url1("http://foo1");
   const GURL url2("http://foo2");
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   controller.Reload(true);
   EXPECT_EQ(0U, notifications.size());
 
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // Now the reload is committed.
   EXPECT_EQ(controller.GetEntryCount(), 2);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
   EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_FALSE(controller.GetPendingEntry());
@@ skipping 39 matching lines @@
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const GURL original_url("http://foo1");
   const GURL final_url("http://foo2");
 
   // Load up the original URL, but get redirected.
   controller.LoadURL(
       original_url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   EXPECT_EQ(0U, notifications.size());
+  main_test_rfh()->PrepareForCommit(final_url);
   main_test_rfh()->SendNavigateWithOriginalRequestURL(
       0, final_url, original_url);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // The NavigationEntry should save both the original URL and the final
   // redirected URL.
   EXPECT_EQ(
       original_url, controller.GetVisibleEntry()->GetOriginalRequestURL());
   EXPECT_EQ(final_url, controller.GetVisibleEntry()->GetURL());
@@ skipping 12 matching lines @@
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_FALSE(controller.CanGoBack());
   EXPECT_FALSE(controller.CanGoForward());
 
   // Make sure the title has been cleared (will be redrawn just after reload).
   // Avoids a stale cached title when the new page being reloaded has no title.
   // See http://crbug.com/96041.
   EXPECT_TRUE(controller.GetVisibleEntry()->GetTitle().empty());
 
   // Send that the navigation has proceeded; say it got redirected again.
+  main_test_rfh()->PrepareForCommit(final_url);
   main_test_rfh()->SendNavigate(0, final_url);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // Now the reload is committed.
   EXPECT_EQ(controller.GetEntryCount(), 1);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
   EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_FALSE(controller.GetPendingEntry());
@@ skipping 141 matching lines @@
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const GURL url1("http://foo/1");
   const GURL url2("http://foo/2");
   const GURL url3("http://foo/3");
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   controller.LoadURL(
       url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   controller.GoBack();
   EXPECT_EQ(0U, notifications.size());
 
   // We should now have a pending navigation to go back.
   EXPECT_EQ(controller.GetEntryCount(), 2);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
   EXPECT_EQ(controller.GetPendingEntryIndex(), 0);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_FALSE(controller.CanGoBack());
   EXPECT_TRUE(controller.CanGoForward());
 
+  main_test_rfh()->PrepareForCommit(url3);
   main_test_rfh()->SendNavigate(2, url3);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // The back navigation resulted in a completely new navigation.
   // TODO(darin): perhaps this behavior will be confusing to users?
   EXPECT_EQ(controller.GetEntryCount(), 3);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 2);
   EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
@@ skipping 37 matching lines @@
 
 // Receives a back message when there is a different renavigation already
 // pending.
 TEST_F(NavigationControllerTest, Back_OtherBackPending) {
   NavigationControllerImpl& controller = controller_impl();
   const GURL kUrl1("http://foo/1");
   const GURL kUrl2("http://foo/2");
   const GURL kUrl3("http://foo/3");
 
   // First navigate three places so we have some back history.
+  main_test_rfh()->PrepareForCommit(kUrl1);
   main_test_rfh()->SendNavigate(0, kUrl1);
+  main_test_rfh()->PrepareForCommit(kUrl2);
   main_test_rfh()->SendNavigate(1, kUrl2);
+  main_test_rfh()->PrepareForCommit(kUrl3);
   main_test_rfh()->SendNavigate(2, kUrl3);
 
   // With nothing pending, say we get a navigation to the second entry.
+  main_test_rfh()->PrepareForCommit(kUrl2);
   main_test_rfh()->SendNavigate(1, kUrl2);
 
   // We know all the entries have the same site instance, so we can just grab
   // a random one for looking up other entries.
   SiteInstance* site_instance =
       NavigationEntryImpl::FromNavigationEntry(
           controller.GetLastCommittedEntry())->site_instance();
 
   // That second URL should be the last committed and it should have gotten the
   // new title.
   EXPECT_EQ(kUrl2, controller.GetEntryWithPageID(site_instance, 1)->GetURL());
   EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
 
   // Now go forward to the last item again and say it was committed.
   controller.GoForward();
+  main_test_rfh()->PrepareForCommit(kUrl3);
   main_test_rfh()->SendNavigate(2, kUrl3);
 
   // Now start going back one to the second page. It will be pending.
   controller.GoBack();
   EXPECT_EQ(1, controller.GetPendingEntryIndex());
   EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
 
   // Not synthesize a totally new back event to the first page. This will not
   // match the pending one.
+  main_test_rfh()->PrepareForCommit(kUrl1);
   main_test_rfh()->SendNavigate(0, kUrl1);
 
   // The committed navigation should clear the pending entry.
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
 
   // But the navigated entry should be the last committed.
   EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(kUrl1, controller.GetLastCommittedEntry()->GetURL());
 }
 
 // Tests what happens when we navigate forward successfully.
 TEST_F(NavigationControllerTest, Forward) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const GURL url1("http://foo1");
   const GURL url2("http://foo2");
 
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   controller.GoBack();
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   controller.GoForward();
 
   // We should now have a pending navigation to go forward.
   EXPECT_EQ(controller.GetEntryCount(), 2);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
   EXPECT_EQ(controller.GetPendingEntryIndex(), 1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_TRUE(controller.CanGoBack());
   EXPECT_TRUE(controller.CanGoToOffset(-1));
   EXPECT_FALSE(controller.CanGoToOffset(-2));  // Cannot go back 2 steps.
   EXPECT_FALSE(controller.CanGoForward());
   EXPECT_FALSE(controller.CanGoToOffset(1));
 
   // Timestamp for entry 0 should be on or after that of entry 1
   // (since we went back to it).
   EXPECT_FALSE(controller.GetEntryAtIndex(0)->GetTimestamp().is_null());
   EXPECT_GE(controller.GetEntryAtIndex(0)->GetTimestamp(),
             controller.GetEntryAtIndex(1)->GetTimestamp());
 
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   // The forward navigation completed successfully.
   EXPECT_EQ(controller.GetEntryCount(), 2);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
   EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_FALSE(controller.GetPendingEntry());
@@ skipping 12 matching lines @@
 // Tests what happens when a forward navigation produces a new page.
 TEST_F(NavigationControllerTest, Forward_GeneratesNewPage) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const GURL url1("http://foo1");
   const GURL url2("http://foo2");
   const GURL url3("http://foo3");
 
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   controller.GoBack();
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
 
   controller.GoForward();
   EXPECT_EQ(0U, notifications.size());
 
   // Should now have a pending navigation to go forward.
   EXPECT_EQ(controller.GetEntryCount(), 2);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 0);
   EXPECT_EQ(controller.GetPendingEntryIndex(), 1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_TRUE(controller.CanGoBack());
   EXPECT_FALSE(controller.CanGoForward());
 
+  main_test_rfh()->PrepareForCommit(url3);
   main_test_rfh()->SendNavigate(2, url3);
   EXPECT_EQ(1U, navigation_entry_committed_counter_);
   navigation_entry_committed_counter_ = 0;
   EXPECT_TRUE(notifications.Check1AndReset(NOTIFICATION_NAV_LIST_PRUNED));
 
   EXPECT_EQ(controller.GetEntryCount(), 2);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
   EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_FALSE(controller.GetPendingEntry());
@@ skipping 641 matching lines @@
   const int kMaxEntryCount = 5;
 
   NavigationControllerImpl::set_max_entry_count_for_testing(kMaxEntryCount);
 
   int url_index;
   // Load up to the max count, all entries should be there.
   for (url_index = 0; url_index < kMaxEntryCount; url_index++) {
     GURL url(base::StringPrintf("http://www.a.com/%d", url_index));
     controller.LoadURL(
         url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+    main_test_rfh()->PrepareForCommit(url);
     main_test_rfh()->SendNavigate(url_index, url);
   }
 
   EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);
 
   // Created a PrunedListener to observe prune notifications.
   PrunedListener listener(&controller);
 
   // Navigate some more.
   GURL url(base::StringPrintf("http://www.a.com/%d", url_index));
   controller.LoadURL(
       url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url);
   main_test_rfh()->SendNavigate(url_index, url);
   url_index++;
 
   // We should have got a pruned navigation.
   EXPECT_EQ(1, listener.notification_count_);
   EXPECT_TRUE(listener.details_.from_front);
   EXPECT_EQ(1, listener.details_.count);
 
   // We expect http://www.a.com/0 to be gone.
   EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);
   EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(),
             GURL("http:////www.a.com/1"));
 
   // More navigations.
   for (int i = 0; i < 3; i++) {
     url = GURL(base::StringPrintf("http:////www.a.com/%d", url_index));
     controller.LoadURL(
         url, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+    main_test_rfh()->PrepareForCommit(url);
     main_test_rfh()->SendNavigate(url_index, url);
     url_index++;
   }
   EXPECT_EQ(controller.GetEntryCount(), kMaxEntryCount);
   EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(),
             GURL("http:////www.a.com/4"));
 
   NavigationControllerImpl::set_max_entry_count_for_testing(original_count);
 }
 
@@ skipping 156 matching lines @@
                 our_controller.GetEntryAtIndex(0))->restore_type());
 }
 
 // Make sure that the page type and stuff is correct after an interstitial.
 TEST_F(NavigationControllerTest, Interstitial) {
   NavigationControllerImpl& controller = controller_impl();
   // First navigate somewhere normal.
   const GURL url1("http://foo");
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
 
   // Now navigate somewhere with an interstitial.
   const GURL url2("http://bar");
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
       set_page_type(PAGE_TYPE_INTERSTITIAL);
 
   // At this point the interstitial will be displayed and the load will still
   // be pending. If the user continues, the load will commit.
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
 
   // The page should be a normal page again.
   EXPECT_EQ(url2, controller.GetLastCommittedEntry()->GetURL());
   EXPECT_EQ(PAGE_TYPE_NORMAL,
             controller.GetLastCommittedEntry()->GetPageType());
 }
 
 TEST_F(NavigationControllerTest, RemoveEntry) {
   NavigationControllerImpl& controller = controller_impl();
   const GURL url1("http://foo/1");
   const GURL url2("http://foo/2");
   const GURL url3("http://foo/3");
   const GURL url4("http://foo/4");
   const GURL url5("http://foo/5");
   const GURL pending_url("http://foo/pending");
   const GURL default_url("http://foo/default");
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   controller.LoadURL(
       url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
   controller.LoadURL(
       url3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url3);
   main_test_rfh()->SendNavigate(2, url3);
   controller.LoadURL(
       url4, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url4);
   main_test_rfh()->SendNavigate(3, url4);
   controller.LoadURL(
       url5, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url5);
   main_test_rfh()->SendNavigate(4, url5);
 
   // Try to remove the last entry.  Will fail because it is the current entry.
   EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
   EXPECT_EQ(5, controller.GetEntryCount());
   EXPECT_EQ(4, controller.GetLastCommittedEntryIndex());
 
   // Go back, but don't commit yet. Check that we can't delete the current
   // and pending entries.
   controller.GoBack();
   EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
   EXPECT_FALSE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 2));
 
   // Now commit and delete the last entry.
+  main_test_rfh()->PrepareForCommit(url4);
   main_test_rfh()->SendNavigate(3, url4);
   EXPECT_TRUE(controller.RemoveEntryAtIndex(controller.GetEntryCount() - 1));
   EXPECT_EQ(4, controller.GetEntryCount());
   EXPECT_EQ(3, controller.GetLastCommittedEntryIndex());
   EXPECT_FALSE(controller.GetPendingEntry());
 
   // Remove an entry which is not the last committed one.
   EXPECT_TRUE(controller.RemoveEntryAtIndex(0));
   EXPECT_EQ(3, controller.GetEntryCount());
   EXPECT_EQ(2, controller.GetLastCommittedEntryIndex());
@@ skipping 10 matching lines @@
 
 TEST_F(NavigationControllerTest, RemoveEntryWithPending) {
   NavigationControllerImpl& controller = controller_impl();
   const GURL url1("http://foo/1");
   const GURL url2("http://foo/2");
   const GURL url3("http://foo/3");
   const GURL default_url("http://foo/default");
 
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(0, url1);
   controller.LoadURL(
       url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
   controller.LoadURL(
       url3, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url3);
   main_test_rfh()->SendNavigate(2, url3);
 
   // Go back, but don't commit yet. Check that we can't delete the current
   // and pending entries.
   controller.GoBack();
   EXPECT_FALSE(controller.RemoveEntryAtIndex(2));
   EXPECT_FALSE(controller.RemoveEntryAtIndex(1));
 
   // Remove the first entry, while there is a pending entry.  This is expected
   // to discard the pending entry.
   EXPECT_TRUE(controller.RemoveEntryAtIndex(0));
   EXPECT_FALSE(controller.GetPendingEntry());
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
 
   // We should update the last committed entry index.
   EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
 
   // Now commit and ensure we land on the right entry.
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(1, url2);
   EXPECT_EQ(2, controller.GetEntryCount());
   EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
   EXPECT_FALSE(controller.GetPendingEntry());
 }
 
 // Tests the transient entry, making sure it goes away with all navigations.
 TEST_F(NavigationControllerTest, TransientEntry) {
   NavigationControllerImpl& controller = controller_impl();
   TestNotificationTracker notifications;
   RegisterForAllNavNotifications(&notifications, &controller);
 
   const GURL url0("http://foo/0");
   const GURL url1("http://foo/1");
   const GURL url2("http://foo/2");
   const GURL url3("http://foo/3");
   const GURL url3_ref("http://foo/3#bar");
   const GURL url4("http://foo/4");
   const GURL transient_url("http://foo/transient");
 
   controller.LoadURL(
       url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url0);
   main_test_rfh()->SendNavigate(0, url0);
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(1, url1);
 
   notifications.Reset();
 
   // Adding a transient with no pending entry.
   NavigationEntryImpl* transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
 
   // We should not have received any notifications.
   EXPECT_EQ(0U, notifications.size());
 
   // Check our state.
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
   EXPECT_EQ(controller.GetEntryCount(), 3);
   EXPECT_EQ(controller.GetLastCommittedEntryIndex(), 1);
   EXPECT_EQ(controller.GetPendingEntryIndex(), -1);
   EXPECT_TRUE(controller.GetLastCommittedEntry());
   EXPECT_FALSE(controller.GetPendingEntry());
   EXPECT_TRUE(controller.CanGoBack());
   EXPECT_FALSE(controller.CanGoForward());
   EXPECT_EQ(contents()->GetMaxPageID(), 1);
 
   // Navigate.
   controller.LoadURL(
       url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(2, url2);
 
   // We should have navigated, transient entry should be gone.
   EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
   EXPECT_EQ(controller.GetEntryCount(), 3);
 
   // Add a transient again, then navigate with no pending entry this time.
   transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
+  main_test_rfh()->PrepareForCommit(url3);
   main_test_rfh()->SendNavigate(3, url3);
   // Transient entry should be gone.
   EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());
   EXPECT_EQ(controller.GetEntryCount(), 4);
 
   // Initiate a navigation, add a transient then commit navigation.
   controller.LoadURL(
       url4, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
+  main_test_rfh()->PrepareForCommit(url4);
   main_test_rfh()->SendNavigate(4, url4);
   EXPECT_EQ(url4, controller.GetVisibleEntry()->GetURL());
   EXPECT_EQ(controller.GetEntryCount(), 5);
 
   // Add a transient and go back.  This should simply remove the transient.
   transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
   EXPECT_TRUE(controller.CanGoBack());
   EXPECT_FALSE(controller.CanGoForward());
   controller.GoBack();
   // Transient entry should be gone.
   EXPECT_EQ(url4, controller.GetVisibleEntry()->GetURL());
   EXPECT_EQ(controller.GetEntryCount(), 5);
+  main_test_rfh()->PrepareForCommit(url3);
   main_test_rfh()->SendNavigate(3, url3);
 
   // Add a transient and go to an entry before the current one.
   transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
   controller.GoToIndex(1);
   // The navigation should have been initiated, transient entry should be gone.
   EXPECT_FALSE(controller.GetTransientEntry());
   EXPECT_EQ(url1, controller.GetPendingEntry()->GetURL());
   // Visible entry does not update for history navigations until commit.
   EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(1, url1);
   EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());
 
   // Add a transient and go to an entry after the current one.
   transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
   controller.GoToIndex(3);
   // The navigation should have been initiated, transient entry should be gone.
   // Because of the transient entry that is removed, going to index 3 makes us
   // land on url2 (which is visible after the commit).
   EXPECT_EQ(url2, controller.GetPendingEntry()->GetURL());
   EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());
+  main_test_rfh()->PrepareForCommit(url2);
   main_test_rfh()->SendNavigate(2, url2);
   EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
 
   // Add a transient and go forward.
   transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
   EXPECT_TRUE(controller.CanGoForward());
   controller.GoForward();
   // We should have navigated, transient entry should be gone.
   EXPECT_FALSE(controller.GetTransientEntry());
   EXPECT_EQ(url3, controller.GetPendingEntry()->GetURL());
   EXPECT_EQ(url2, controller.GetVisibleEntry()->GetURL());
+  main_test_rfh()->PrepareForCommit(url3);
   main_test_rfh()->SendNavigate(3, url3);
   EXPECT_EQ(url3, controller.GetVisibleEntry()->GetURL());
 
   // Add a transient and do an in-page navigation, replacing the current entry.
   transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
+  main_test_rfh()->PrepareForCommit(url3_ref);
   main_test_rfh()->SendNavigate(3, url3_ref);
   // Transient entry should be gone.
   EXPECT_FALSE(controller.GetTransientEntry());
   EXPECT_EQ(url3_ref, controller.GetVisibleEntry()->GetURL());
 
   // Ensure the URLs are correct.
   EXPECT_EQ(controller.GetEntryCount(), 5);
   EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url0);
   EXPECT_EQ(controller.GetEntryAtIndex(1)->GetURL(), url1);
   EXPECT_EQ(controller.GetEntryAtIndex(2)->GetURL(), url2);
   EXPECT_EQ(controller.GetEntryAtIndex(3)->GetURL(), url3_ref);
   EXPECT_EQ(controller.GetEntryAtIndex(4)->GetURL(), url4);
 }
 
 // Test that Reload initiates a new navigation to a transient entry's URL.
 TEST_F(NavigationControllerTest, ReloadTransient) {
   NavigationControllerImpl& controller = controller_impl();
   const GURL url0("http://foo/0");
   const GURL url1("http://foo/1");
   const GURL transient_url("http://foo/transient");
 
   // Load |url0|, and start a pending navigation to |url1|.
   controller.LoadURL(
       url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
+  main_test_rfh()->PrepareForCommit(url0);
   main_test_rfh()->SendNavigate(0, url0);
   controller.LoadURL(
       url1, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
 
   // A transient entry is added, interrupting the navigation.
   NavigationEntryImpl* transient_entry = new NavigationEntryImpl;
   transient_entry->SetURL(transient_url);
   controller.SetTransientEntry(transient_entry);
   EXPECT_TRUE(controller.GetTransientEntry());
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
 
   // The page is reloaded, which should remove the pending entry for |url1| and
   // the transient entry for |transient_url|, and start a navigation to
   // |transient_url|.
   controller.Reload(true);
   EXPECT_FALSE(controller.GetTransientEntry());
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_EQ(transient_url, controller.GetVisibleEntry()->GetURL());
   ASSERT_EQ(controller.GetEntryCount(), 1);
   EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url0);
 
   // Load of |transient_url| completes.
+  main_test_rfh()->PrepareForCommit(transient_url);
   main_test_rfh()->SendNavigate(1, transient_url);
   ASSERT_EQ(controller.GetEntryCount(), 2);
   EXPECT_EQ(controller.GetEntryAtIndex(0)->GetURL(), url0);
   EXPECT_EQ(controller.GetEntryAtIndex(1)->GetURL(), transient_url);
 }
 
 // Ensure that renderer initiated pending entries get replaced, so that we
 // don't show a stale virtual URL when a navigation commits.
 // See http://crbug.com/266922.
 TEST_F(NavigationControllerTest, RendererInitiatedPendingEntries) {
@@ skipping 63 matching lines @@
 
   const GURL url0("http://foo/0");
   const GURL url1("http://foo/1");
 
   // For typed navigations (browser-initiated), both pending and visible entries
   // should update before commit.
   controller.LoadURL(
       url0, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   EXPECT_EQ(url0, controller.GetPendingEntry()->GetURL());
   EXPECT_EQ(url0, controller.GetVisibleEntry()->GetURL());
+  main_test_rfh()->PrepareForCommit(url0);
   main_test_rfh()->SendNavigate(0, url0);
 
   // For link clicks (renderer-initiated navigations), the pending entry should
   // update before commit but the visible should not.
   NavigationController::LoadURLParams load_url_params(url1);
   load_url_params.is_renderer_initiated = true;
   controller.LoadURLWithParams(load_url_params);
   EXPECT_EQ(url0, controller.GetVisibleEntry()->GetURL());
   EXPECT_EQ(url1, controller.GetPendingEntry()->GetURL());
   EXPECT_TRUE(
       NavigationEntryImpl::FromNavigationEntry(controller.GetPendingEntry())->
           is_renderer_initiated());
 
   // After commit, both visible should be updated, there should be no pending
   // entry, and we should no longer treat the entry as renderer-initiated.
+  main_test_rfh()->PrepareForCommit(url1);
   main_test_rfh()->SendNavigate(1, url1);
   EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());
   EXPECT_FALSE(controller.GetPendingEntry());
   EXPECT_FALSE(
       NavigationEntryImpl::FromNavigationEntry(
           controller.GetLastCommittedEntry())->is_renderer_initiated());
 
   notifications.Reset();
 }
 
@@ skipping 1017 matching lines @@
   contents()->CommitPendingNavigation();
   process()->sink().ClearMessages();
 
   // Simulate the page calling history.back(). It should create a pending entry.
   contents()->OnGoToEntryAtOffset(-1);
   EXPECT_EQ(0, controller.GetPendingEntryIndex());
   // The actual cross-navigation is suspended until the current RVH tells us
   // it unloaded, simulate that.
   contents()->ProceedWithCrossSiteNavigation();
   // Also make sure we told the page to navigate.
-  const IPC::Message* message = GetLastNavigationRequest();
-  ASSERT_TRUE(message != NULL);
-  GURL nav_url = GetNavigationURLFromIPC(message);
+  GURL nav_url = GetLastNavigationURL();
   EXPECT_EQ(url1, nav_url);
+  contents()->CommitPendingNavigation();
   process()->sink().ClearMessages();
 
   // Now test history.forward()
   contents()->OnGoToEntryAtOffset(2);
   EXPECT_EQ(2, controller.GetPendingEntryIndex());
   // The actual cross-navigation is suspended until the current RVH tells us
   // it unloaded, simulate that.
   contents()->ProceedWithCrossSiteNavigation();
-  message = GetLastNavigationRequest();
-  ASSERT_TRUE(message != NULL);
-  nav_url = GetNavigationURLFromIPC(message);
+  nav_url = GetLastNavigationURL();
   EXPECT_EQ(url3, nav_url);
+  contents()->CommitPendingNavigation();
   process()->sink().ClearMessages();
 
   controller.DiscardNonCommittedEntries();
 
   // Make sure an extravagant history.go() doesn't break.
   contents()->OnGoToEntryAtOffset(120);  // Out of bounds.
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
-  message = GetLastNavigationRequest();
-  EXPECT_TRUE(message == NULL);
+  EXPECT_FALSE(HasNavigationRequest());
 }
 
 // Test call to PruneAllButLastCommitted for the only entry.
 TEST_F(NavigationControllerTest, PruneAllButLastCommittedForSingle) {
   NavigationControllerImpl& controller = controller_impl();
   const GURL url1("http://foo1");
   NavigateAndCommit(url1);
 
   contents()->ExpectSetHistoryOffsetAndLength(0, 1);
 
@@ skipping 68 matching lines @@
 
   // We should only have the last committed and pending entries at this point,
   // and the pending entry should still not be in the entry list.
   EXPECT_EQ(0, controller.GetLastCommittedEntryIndex());
   EXPECT_EQ(url2, controller.GetEntryAtIndex(0)->GetURL());
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_TRUE(controller.GetPendingEntry());
   EXPECT_EQ(1, controller.GetEntryCount());
 
   // Try to commit the pending entry.
+  main_test_rfh()->PrepareForCommit(url3);
   main_test_rfh()->SendNavigate(2, url3);
   EXPECT_EQ(-1, controller.GetPendingEntryIndex());
   EXPECT_FALSE(controller.GetPendingEntry());
   EXPECT_EQ(2, controller.GetEntryCount());
   EXPECT_EQ(url3, controller.GetEntryAtIndex(1)->GetURL());
 }
 
 // Test to ensure that when we do a history navigation back to the current
 // committed page (e.g., going forward to a slow-loading page, then pressing
 // the back button), we just stop the navigation to prevent the throbber from
@@ skipping 333 matching lines @@
   params.post_id = -1;
   contents()->GetMainFrame()->SendNavigateWithParams(&params);
 
   // Now reload. replaceState overrides the POST, so we should not show a
   // repost warning dialog.
   controller_impl().Reload(true);
   EXPECT_EQ(0, delegate->repost_form_warning_count());
 }
 
 }  // namespace content