Instant: Use only one hidden WebContents per profile.

chrome/browser/instant/instant_controller_utils.h

Index: chrome/browser/instant/instant_controller_utils.h
diff --git a/chrome/browser/instant/instant_controller_utils.h b/chrome/browser/instant/instant_controller_utils.h
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+++ b/chrome/browser/instant/instant_controller_utils.h
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+// Copyright 2013 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_CONTROLLER_UTILS_H_
+#define CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_UTILS_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/string16.h"
+#include "chrome/browser/instant/instant_commit_type.h"
+#include "chrome/browser/ui/omnibox/omnibox_edit_model.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace content {
+class WebContents;
+}
+
+class InstantControllerUtils {
+ public:
+  static gfx::NativeView GetViewGainingFocus(
+      gfx::NativeView view_gaining_focus);
+
+  // Returns true if |view| is the top-level contents view or a child view in
+  // the view hierarchy of |contents|.
+  static bool IsViewInContents(gfx::NativeView view,
+                               content::WebContents* contents);
+
+  static bool NormalizeAndStripPrefix(string16* text, const string16& prefix);
+
+  static std::string CommitTypeToString(InstantCommitType type);
+
+  static std::string FocusStateToString(OmniboxFocusState state);
+
+  static std::string FocusChangeReasonToString(OmniboxFocusChangeReason reason);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(InstantControllerUtils);
+};
+
+#endif  // CHROME_BROWSER_INSTANT_INSTANT_CONTROLLER_UTILS_H_