Remove a chrome dependency by removing Prerender from ResourceDispatcherHost.

chrome/browser/prerender/prerender_manager.cc

 // Copyright (c) 2011 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 "chrome/browser/prerender/prerender_manager.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/browser/favicon/favicon_tab_helper.h"
 #include "chrome/browser/prerender/prerender_contents.h"
 #include "chrome/browser/prerender/prerender_final_status.h"
 #include "chrome/browser/prerender/prerender_observer.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper_delegate.h"
 #include "chrome/common/render_messages.h"
 #include "content/browser/browser_thread.h"
@@ skipping 175 matching lines @@
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   PrerenderManager* prerender_manager = prerender_manager_weak_ptr.get();
   if (!prerender_manager)
     return;
 
   prerender_manager->DestroyPreloadForChildRouteIdPair(
       std::make_pair(render_process_id, render_view_id),
       final_status);
 }
 
-PrerenderManager::PrerenderManager(Profile* profile)
+PrerenderManager::PrerenderManager(Profile* profile,
+                                   PrerenderTracker* prerender_tracker)
     : rate_limit_enabled_(true),
       enabled_(true),
       profile_(profile),
+      prerender_tracker_(prerender_tracker),
       max_prerender_age_(base::TimeDelta::FromSeconds(
           kDefaultMaxPrerenderAgeSeconds)),
       max_prerender_memory_mb_(kDefaultMaxPrerenderMemoryMB),
       max_elements_(kDefaultMaxPrerenderElements),
       prerender_contents_factory_(PrerenderContents::CreateFactory()),
       last_prerender_start_time_(GetCurrentTimeTicks() -
           base::TimeDelta::FromMilliseconds(kMinTimeBetweenPrerendersMs)),
       runnable_method_factory_(this) {
   // There are some assumptions that the PrerenderManager is on the UI thread.
   // Any other checks simply make sure that the PrerenderManager is accessed on
@@ skipping 224 matching lines @@
     return false;
   }
 
   int child_id, route_id;
   CHECK(prerender_contents->GetChildId(&child_id));
   CHECK(prerender_contents->GetRouteId(&route_id));
 
   // Try to set the prerendered page as used, so any subsequent attempts to
   // cancel on other threads will fail.  If this fails because the prerender
   // was already cancelled, possibly on another thread, fail.
-  if (!PrerenderTracker::GetInstance()->TryUse(child_id, route_id))
+  if (!prerender_tracker_->TryUse(child_id, route_id))
     return false;
 
   if (!prerender_contents->load_start_time().is_null())
     RecordTimeUntilUsed(GetCurrentTimeTicks() -
                         prerender_contents->load_start_time());
 
   UMA_HISTOGRAM_COUNTS("Prerender.PrerendersPerSessionCount",
                        ++prerenders_per_session_count_);
   prerender_contents->set_final_status(FINAL_STATUS_USED);
 
@@ skipping 91 matching lines @@
     return false;
   }
 
   int child_id, route_id;
   CHECK(prerender_contents->GetChildId(&child_id));
   CHECK(prerender_contents->GetRouteId(&route_id));
 
   // Try to set the prerendered page as used, so any subsequent attempts to
   // cancel on other threads will fail.  If this fails because the prerender
   // was already cancelled, possibly on another thread, fail.
-  if (!PrerenderTracker::GetInstance()->TryUse(child_id, route_id))
+  if (!prerender_tracker_->TryUse(child_id, route_id))
     return false;
 
   if (!prerender_contents->load_start_time().is_null())
     RecordTimeUntilUsed(GetCurrentTimeTicks() -
                         prerender_contents->load_start_time());
 
   UMA_HISTOGRAM_COUNTS("Prerender.PrerendersPerSessionCount",
                        ++prerenders_per_session_count_);
   prerender_contents->set_final_status(FINAL_STATUS_USED);
 
@@ skipping 101 matching lines @@
   DCHECK(CalledOnValidThread());
   base::Time now = GetCurrentTime();
   return (now - start < max_prerender_age_);
 }
 
 PrerenderContents* PrerenderManager::CreatePrerenderContents(
     const GURL& url,
     const GURL& referrer) {
   DCHECK(CalledOnValidThread());
   return prerender_contents_factory_->CreatePrerenderContents(
-      this, profile_, url, referrer);
+      this, prerender_tracker_, profile_, url, referrer);
 }
 
 void PrerenderManager::DeletePendingDeleteEntries() {
   while (!pending_delete_list_.empty()) {
     PrerenderContents* contents = pending_delete_list_.front();
     pending_delete_list_.pop_front();
     delete contents;
   }
 }
 
@@ skipping 307 matching lines @@
   base::TimeTicks cutoff = GetCurrentTimeTicks() -
       base::TimeDelta::FromMilliseconds(kNavigationRecordWindowMs);
   while (!navigations_.empty()) {
     if (navigations_.front().time_ > cutoff)
       break;
     navigations_.pop_front();
   }
 }
 
 }  // namespace prerender