Support auto-reload on errors.

chrome/renderer/net/net_error_helper_core.h

Index: chrome/renderer/net/net_error_helper_core.h
diff --git a/chrome/renderer/net/net_error_helper_core.h b/chrome/renderer/net/net_error_helper_core.h
index cfbc8a154e2089a31da691f09567f5f2d23b2630..aa1ae9b45eb7d6d7452d94864e4f3a9d7446efff 100644
--- a/chrome/renderer/net/net_error_helper_core.h
+++ b/chrome/renderer/net/net_error_helper_core.h
@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/common/net/net_error_info.h"
 #include "url/gurl.h"
@@ -31,6 +32,15 @@ class NetErrorHelperCore {
     ERROR_PAGE,
   };
 
+  class MockableOneShotTimer {
+   public:
+    virtual void Start(const tracked_objects::Location& posted_from,
+                       base::TimeDelta delay,
+                       const base::Closure& user_task) = 0;
+    virtual void Stop() = 0;
+    virtual bool IsRunning() const = 0;
+  };
+
   // The Delegate handles all interaction with the RenderView, WebFrame, and
   // the network, as well as the generation of error pages.
   class Delegate {
@@ -58,6 +68,15 @@ class NetErrorHelperCore {
     // Cancels an error page fetch.  Does nothing if no fetch is ongoing.
     virtual void CancelFetchErrorPage() = 0;
 
+    // Starts a fetch of |url| for autoreload.
+    virtual void FetchAutoReloadPage(const GURL& url) = 0;
+
+    // Cancels an autoreload fetch.
+    virtual void CancelFetchAutoReloadPage() = 0;
+
+    // Allocates a new MockableOneShotTimer.
+    virtual MockableOneShotTimer* NewMockableOneShotTimer() = 0;
+
    protected:
     virtual ~Delegate() {}
   };
@@ -96,6 +115,13 @@ class NetErrorHelperCore {
     alt_error_page_url_ = alt_error_page_url;
   }
 
+  void set_auto_reload_enabled(bool auto_reload_enabled) {
+    auto_reload_enabled_ = auto_reload_enabled;
+  }
+
+  virtual void StartAutoReload();
+  virtual bool IsAutoReloading() const;
+
  private:
   struct ErrorPageInfo;
 
@@ -126,6 +152,12 @@ class NetErrorHelperCore {
   scoped_ptr<ErrorPageInfo> committed_error_page_info_;
 
   GURL alt_error_page_url_;
+
+  bool auto_reload_enabled_;
+  scoped_ptr<MockableOneShotTimer> auto_reload_timer_;
+  int auto_reload_count_;
+
+  void AutoReload();
 };
 
 #endif  // CHROME_RENDERER_NET_NET_ERROR_HELPER_CORE_H_