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diff --git a/chrome/browser/tab_contents/web_navigation_observer.h b/chrome/browser/tab_contents/web_navigation_observer.h
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+++ b/chrome/browser/tab_contents/web_navigation_observer.h
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+// Copyright (c) 2010 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_TAB_CONTENTS_WEB_NAVIGATION_OBSERVER_H_
+#define CHROME_BROWSER_TAB_CONTENTS_WEB_NAVIGATION_OBSERVER_H_
+
+#include "chrome/browser/tab_contents/navigation_controller.h"
+
+struct ViewHostMsg_FrameNavigate_Params;
+
+// An observer API implemented by classes which are interested in various page
+// load events from TabContents.
+
+// TODO(pink): Is it worth having a bitfield where certain clients can only
+// register for certain events? Is the extra function call worth the added pain
+// on the caller to build the bitfield?
+
+class WebNavigationObserver {
+ public:
+  // For removing PasswordManager deps...
+
+  virtual void NavigateToPendingEntry() { }
+
+  virtual void DidNavigateMainFramePostCommit(
+      const NavigationController::LoadCommittedDetails& details,
+      const ViewHostMsg_FrameNavigate_Params& params) { }
+  virtual void DidNavigateAnyFramePostCommit(
+      const NavigationController::LoadCommittedDetails& details,
+      const ViewHostMsg_FrameNavigate_Params& params) { }
+
+  virtual void DidStartLoading() { }
+  virtual void DidStopLoading() { }
+
+  // TODO(pinkerton): Not sure the best place for these.
+  virtual void PasswordFormsFound(
+      const std::vector<webkit_glue::PasswordForm>& forms) { }
+  virtual void PasswordFormsVisible(
+      const std::vector<webkit_glue::PasswordForm>& visible_forms) { }
+
+#if 0
+  // For unifying with delegate...
+
+  // Notifies the delegate that this contents is starting or is done loading
+  // some resource. The delegate should use this notification to represent
+  // loading feedback. See TabContents::is_loading()
+  virtual void LoadingStateChanged(TabContents* contents) { }
+  // Called to inform the delegate that the tab content's navigation state
+  // changed. The |changed_flags| indicates the parts of the navigation state
+  // that have been updated, and is any combination of the
+  // |TabContents::InvalidateTypes| bits.
+  virtual void NavigationStateChanged(const TabContents* source,
+                                      unsigned changed_flags) { }
+#endif
+};
+
+#endif  // CHROME_BROWSER_TAB_CONTENTS_WEB_NAVIGATION_OBSERVER_H_