Makes InfoBarService not close infobars on a reload from browser instant

chrome/browser/infobars/infobar_service.h

Index: chrome/browser/infobars/infobar_service.h
diff --git a/chrome/browser/infobars/infobar_service.h b/chrome/browser/infobars/infobar_service.h
index d502b58f1905d6ec36c0ee065a2e00325954876a..9468eb45d1f798b15b72184fc2091d760eaa5188 100644
--- a/chrome/browser/infobars/infobar_service.h
+++ b/chrome/browser/infobars/infobar_service.h
@@ -37,6 +37,14 @@ class InfoBarService : public infobars::InfoBarManager,
   static content::WebContents* WebContentsFromInfoBar(
       infobars::InfoBar* infobar);
 
+  // Makes it so the next reload is ignored. That is, if the next commit is a
+  // reload then it is treated as if nothing happened and no infobars are
+  // attempted to be closed.
+  // This is useful for non-user triggered reloads that should not dismiss
+  // infobars. For example, instant may trigger a reload when the google URL
+  // changes.
+  void set_ignore_next_reload() { ignore_next_reload_ = true; }
+
  private:
   friend class content::WebContentsUserData<InfoBarService>;
 
@@ -53,6 +61,9 @@ class InfoBarService : public infobars::InfoBarManager,
 
   // content::WebContentsObserver:
   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
+  virtual void DidStartNavigationToPendingEntry(
+      const GURL& url,
+      content::NavigationController::ReloadType reload_type) OVERRIDE;
   virtual void NavigationEntryCommitted(
       const content::LoadCommittedDetails& load_details) OVERRIDE;
   virtual void WebContentsDestroyed() OVERRIDE;
@@ -62,6 +73,8 @@ class InfoBarService : public infobars::InfoBarManager,
   void OnDidBlockDisplayingInsecureContent();
   void OnDidBlockRunningInsecureContent();
 
+  // See description in set_ignore_next_reload().
+  bool ignore_next_reload_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarService);
 };