PlzNavigate: Speculatively spawns a renderer process for navigations.

content/public/test/web_contents_tester.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_TEST_WEB_CONTENTS_TESTER_H_
 #define CONTENT_PUBLIC_TEST_WEB_CONTENTS_TESTER_H_
 
 #include "ui/base/page_transition_types.h"
 
 class GURL;
@@ skipping 44 matching lines @@
   static WebContents* CreateTestWebContents(
       BrowserContext* browser_context,
       SiteInstance* instance);
 
   // Simulates the appropriate RenderView (pending if any, current otherwise)
   // sending a navigate notification for the NavigationController pending entry.
   virtual void CommitPendingNavigation() = 0;
 
   // Gets the pending RenderFrameHost, if any, for the main frame. For the
   // current RenderFrameHost of the main frame, use WebContents::GetMainFrame().
+  // PlzNavigate: When browser side navigation is enabled it returns the
+  // speculative RenderFrameHost for the main frame if one exists.
   virtual RenderFrameHost* GetPendingMainFrame() const = 0;
 
   // Creates a pending navigation to the given URL with the default parameters
   // and then commits the load with a page ID one larger than any seen. This
   // emulates what happens on a new navigation.
   virtual void NavigateAndCommit(const GURL& url) = 0;
 
   // Sets the loading state to the given value.
   virtual void TestSetIsLoading(bool value) = 0;
 
@@ skipping 14 matching lines @@
       const Referrer& referrer,
       ui::PageTransition transition) = 0;
 
   // Promote ComputeWebkitPrefs to public.
   virtual WebPreferences TestComputeWebkitPrefs() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_WEB_CONTENTS_TESTER_H_