Surface button for loading stale cache copy on net error page.

chrome/renderer/net/net_error_page_controller.h

Index: chrome/renderer/net/net_error_page_controller.h
diff --git a/chrome/renderer/net/net_error_page_controller.h b/chrome/renderer/net/net_error_page_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..a3a615fef2375da0f36a0ca0d6e8d378f8b2c9a2
--- /dev/null
+++ b/chrome/renderer/net/net_error_page_controller.h
@@ -0,0 +1,53 @@
+// Copyright 2014 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 CHROME_RENDERER_NET_NET_ERROR_PAGE_CONTROLLER_H_
+#define CHROME_RENDERER_NET_NET_ERROR_PAGE_CONTROLLER_H_
+
+#include "base/macros.h"
+#include "content/public/renderer/render_frame_observer.h"
+#include "gin/wrappable.h"
+
+
+namespace content {
+class RenderFrame;
+}
+
+// This class makes various helper functions available to the
+// error page loaded by NetErrorHelper.  It is bound to the JavaScript
+// window.errorPageController object.
+class NetErrorPageController
+    : public gin::Wrappable<NetErrorPageController>,
+      public content::RenderFrameObserver {
+ public:
+  static gin::WrapperInfo kWrapperInfo;
+
+  static void Install(content::RenderFrame* render_frame);
+
+ private:
+  explicit NetErrorPageController(content::RenderFrame* render_frame);
+  virtual ~NetErrorPageController();
+
+  // Execute a "Load Stale" button click.
+  bool LoadStaleButtonClick();
+
+  // Execute a "Reload" button click.
+  bool ReloadButtonClick();
+
+  // Execute a "More" button click.
+  bool MoreButtonClick();
+
+  // gin::WrappableBase
+  virtual gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+      v8::Isolate* isolate) OVERRIDE;
+
+  // RenderFrameObserver.  Overridden to avoid being destroyed when RenderFrame
+  // goes away; NetErrorPageController objects are owned by the JS
+  // garbage collector.
+  virtual void OnDestruct() OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(NetErrorPageController);
+};
+
+#endif  // CHROME_RENDERER_NET_NET_ERROR_PAGE_CONTROLLER_H_