PlzNavigate: Speculatively spawns a renderer process for navigations.

content/test/test_web_contents.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 "content/test/test_web_contents.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "content/browser/browser_url_handler_impl.h"
@@ skipping 136 matching lines @@
   TestRenderFrameHost* old_rfh = GetMainFrame();
   const NavigationEntry* entry = GetController().GetPendingEntry();
   DCHECK(entry);
 
   // Simulate the BeforeUnload ACK if necessary.
   // PlzNavigate: the pending RFH is not created before the navigation commit,
   // so it is necessary to simulate the IO thread response here to commit in the
   // proper renderer.
   old_rfh->PrepareForCommit(entry->GetURL());
 
-  TestRenderFrameHost* rfh = GetPendingMainFrame();
+  TestRenderFrameHost* rfh = GetFutureMainFrame();
+
   if (!rfh)
     rfh = old_rfh;
 
   int page_id = entry->GetPageID();
   if (page_id == -1) {
     // It's a new navigation, assign a never-seen page id to it.
     page_id = GetMaxPageIDForSiteInstance(rfh->GetSiteInstance()) + 1;
   }
 
   rfh->SendNavigate(page_id, entry->GetURL());
   // Simulate the SwapOut_ACK. This is needed when cross-site navigation
   // happens.
   if (old_rfh != rfh)
     old_rfh->OnSwappedOut();
 }
 
 void TestWebContents::ProceedWithCrossSiteNavigation() {
-  if (!GetPendingMainFrame())
+  if (!GetPendingMainFrame() ||

[clamy, 2014/12/29 17:36:22]

This return is no longer necessary, as following the unit test helper functions
refactoring we should no longer be calling this in PlzNavigate unit tests.

[carlosk, 2014/12/30 15:54:50]

Done.

+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableBrowserSideNavigation)) {
     return;
+  }
   GetMainFrame()->SendBeforeUnloadACK(true);
 }
 
 RenderViewHostDelegateView* TestWebContents::GetDelegateView() {
   if (delegate_view_override_)
     return delegate_view_override_;
   return WebContentsImpl::GetDelegateView();
 }
 
 void TestWebContents::SetOpener(TestWebContents* opener) {
@@ skipping 63 matching lines @@
                                         bool user_gesture) {
 }
 
 void TestWebContents::ShowCreatedWidget(int route_id,
                                         const gfx::Rect& initial_pos) {
 }
 
 void TestWebContents::ShowCreatedFullscreenWidget(int route_id) {
 }
 
+TestRenderFrameHost* TestWebContents::GetSpeculativeMainFrame() const {
+  return static_cast<TestRenderFrameHost*>(
+      GetRenderManager()->speculative_render_frame_host_.get());
+}
+
+TestRenderFrameHost* TestWebContents::GetFutureMainFrame() const {
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableBrowserSideNavigation)) {
+    return GetSpeculativeMainFrame();
+  }
+  return GetPendingMainFrame();
+}
+
 }  // namespace content