Handle interface to prerenders.

chrome/browser/predictors/autocomplete_action_predictor.cc

Index: chrome/browser/predictors/autocomplete_action_predictor.cc
diff --git a/chrome/browser/predictors/autocomplete_action_predictor.cc b/chrome/browser/predictors/autocomplete_action_predictor.cc
index 2ac67fa6c65b71987b8115c7a96983df3876f2fd..6cdc98f31fd8997f7aca422937a52b9488f96b6a 100644
--- a/chrome/browser/predictors/autocomplete_action_predictor.cc
+++ b/chrome/browser/predictors/autocomplete_action_predictor.cc
@@ -26,6 +26,7 @@
 #include "chrome/browser/predictors/predictor_database.h"
 #include "chrome/browser/predictors/predictor_database_factory.h"
 #include "chrome/browser/prerender/prerender_field_trial.h"
+#include "chrome/browser/prerender/prerender_handle.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_manager_factory.h"
 #include "chrome/browser/profiles/profile.h"
@@ -153,6 +154,20 @@ void AutocompleteActionPredictor::ClearTransitionalMatches() {
   transitional_matches_.clear();
 }
 
+void AutocompleteActionPredictor::StartPrerendering(
+    const GURL& url,
+    content::SessionStorageNamespace* session_storage_namespace,
+    gfx::Size size) {
+  if (prerender::PrerenderManager* prerender_manager =
+          prerender::PrerenderManagerFactory::GetForProfile(profile_)) {
+    prerender_handle_.reset(
+        prerender_manager->AddPrerenderFromOmnibox(
+            url, session_storage_namespace, size));
+  } else {
+    prerender_handle_.reset();

[mmenke, 2012/07/09 18:06:57]

I'd suggest doing the reset first.  I believe it may be able to affect the math
on the number of processes we have.

[mmenke, 2012/07/10 18:01:13]

Forgot that we always delay deletion, so it probably doesn't actually matter.

[gavinp, 2012/07/11 17:04:00]

Done. It will definitely affect the final status.

[gavinp, 2012/07/11 17:04:00]

I think it does matter, since we'll be calling OnCancel which will call
PrerenderContents::Destroy(). I think the final status changes from evicted to
canceled, which is more proper.

+  }
+}
+
 // Given a match, return a recommended action.
 AutocompleteActionPredictor::Action
     AutocompleteActionPredictor::RecommendAction(