Persist the Instant API to committed search result pages.

chrome/browser/instant/instant_tab.h

Index: chrome/browser/instant/instant_tab.h
diff --git a/chrome/browser/instant/instant_tab.h b/chrome/browser/instant/instant_tab.h
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+// Copyright 2012 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_BROWSER_INSTANT_INSTANT_TAB_H_
+#define CHROME_BROWSER_INSTANT_INSTANT_TAB_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/string16.h"
+#include "chrome/browser/instant/instant_client.h"
+
+struct InstantAutocompleteResult;
+class InstantController;
+
+namespace content {
+class WebContents;
+}
+
+// InstantTab is used to communicate with a committed search results page, i.e.,
+// an actual tab on the tab strip (compare: InstantLoader, which has a preview
+// page that appears and disappears as the user types in the omnibox).
+class InstantTab : public InstantClient::Delegate {
+ public:
+  // Doesn't take ownership of either |controller| or |contents|.
+  InstantTab(InstantController* controller, content::WebContents* contents);
+  virtual ~InstantTab();
+
+  content::WebContents* contents() const { return contents_; }
+
+  // Start observing |contents_| for messages. Sends a message to determine if
+  // the page supports the Instant API.
+  void Init();
+
+  // Calls through to methods of the same name on InstantClient.
+  void Update(const string16& text,
+              size_t selection_start,
+              size_t selection_end,
+              bool verbatim);
+  void Submit(const string16& text);
+  void SendAutocompleteResults(
+      const std::vector<InstantAutocompleteResult>& results);
+  void UpOrDownKeyPressed(int count);
+
+ private:
+  // Overridden from InstantClient::Delegate:
+  virtual void SetSuggestions(
+      const std::vector<InstantSuggestion>& suggestions) OVERRIDE;
+  virtual void InstantSupportDetermined(bool supports_instant) OVERRIDE;
+  virtual void ShowInstantPreview(InstantShownReason reason,
+                                  int height,
+                                  InstantSizeUnits units) OVERRIDE;
+
+  InstantClient client_;
+  InstantController* const controller_;
+  content::WebContents* const contents_;
+  bool supports_instant_;
+
+  DISALLOW_COPY_AND_ASSIGN(InstantTab);
+};
+
+#endif  // CHROME_BROWSER_INSTANT_INSTANT_TAB_H_