Move PageTransition into content namespace. While I'm touching all these files, I've also updated...

content/common/page_transition_types.h

-// Copyright (c) 2011 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 CONTENT_COMMON_PAGE_TRANSITION_TYPES_H_
-#define CONTENT_COMMON_PAGE_TRANSITION_TYPES_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "content/common/content_export.h"
-
-// This class is for scoping only.
-class CONTENT_EXPORT PageTransition {
- public:
-  // Types of transitions between pages. These are stored in the history
-  // database to separate visits, and are reported by the renderer for page
-  // navigations.
-  //
-  // WARNING: don't change these numbers. They are written directly into the
-  // history database, so future versions will need the same values to match
-  // the enums.
-  //
-  // A type is made of a core value and a set of qualifiers. A type has one
-  // core value and 0 or or more qualifiers.
-  enum TypeEnum {
-    // User got to this page by clicking a link on another page.
-    LINK = 0,
-
-    // User got this page by typing the URL in the URL bar.  This should not be
-    // used for cases where the user selected a choice that didn't look at all
-    // like a URL; see GENERATED below.
-    //
-    // We also use this for other "explicit" navigation actions.
-    TYPED = 1,
-
-    // User got to this page through a suggestion in the UI, for example,
-    // through the destinations page.
-    AUTO_BOOKMARK = 2,
-
-    // This is a subframe navigation. This is any content that is automatically
-    // loaded in a non-toplevel frame. For example, if a page consists of
-    // several frames containing ads, those ad URLs will have this transition
-    // type. The user may not even realize the content in these pages is a
-    // separate frame, so may not care about the URL (see MANUAL below).
-    AUTO_SUBFRAME = 3,
-
-    // For subframe navigations that are explicitly requested by the user and
-    // generate new navigation entries in the back/forward list. These are
-    // probably more important than frames that were automatically loaded in
-    // the background because the user probably cares about the fact that this
-    // link was loaded.
-    MANUAL_SUBFRAME = 4,
-
-    // User got to this page by typing in the URL bar and selecting an entry
-    // that did not look like a URL.  For example, a match might have the URL
-    // of a Google search result page, but appear like "Search Google for ...".
-    // These are not quite the same as TYPED navigations because the user
-    // didn't type or see the destination URL.
-    // See also KEYWORD.
-    GENERATED = 5,
-
-    // The page was specified in the command line or is the start page.
-    START_PAGE = 6,
-
-    // The user filled out values in a form and submitted it. NOTE that in
-    // some situations submitting a form does not result in this transition
-    // type. This can happen if the form uses script to submit the contents.
-    FORM_SUBMIT = 7,
-
-    // The user "reloaded" the page, either by hitting the reload button or by
-    // hitting enter in the address bar.  NOTE: This is distinct from the
-    // concept of whether a particular load uses "reload semantics" (i.e.
-    // bypasses cached data).  For this reason, lots of code needs to pass
-    // around the concept of whether a load should be treated as a "reload"
-    // separately from their tracking of this transition type, which is mainly
-    // used for proper scoring for consumers who care about how frequently a
-    // user typed/visited a particular URL.
-    //
-    // SessionRestore and undo tab close use this transition type too.
-    RELOAD = 8,
-
-    // The url was generated from a replaceable keyword other than the default
-    // search provider. If the user types a keyword (which also applies to
-    // tab-to-search) in the omnibox this qualifier is applied to the transition
-    // type of the generated url. TemplateURLModel then may generate an
-    // additional visit with a transition type of KEYWORD_GENERATED against the
-    // url 'http://' + keyword. For example, if you do a tab-to-search against
-    // wikipedia the generated url has a transition qualifer of KEYWORD, and
-    // TemplateURLModel generates a visit for 'wikipedia.org' with a transition
-    // type of KEYWORD_GENERATED.
-    KEYWORD = 9,
-
-    // Corresponds to a visit generated for a keyword. See description of
-    // KEYWORD for more details.
-    KEYWORD_GENERATED = 10,
-
-    // ADDING NEW CORE VALUE? Be sure to update the LAST_CORE and CORE_MASK
-    // values below.  Also update CoreTransitionString().
-    LAST_CORE = KEYWORD_GENERATED,
-    CORE_MASK = 0xFF,
-
-    // Qualifiers
-    // Any of the core values above can be augmented by one or more qualifiers.
-    // These qualifiers further define the transition.
-
-    // User used the Forward or Back button to navigate among browsing history.
-    FORWARD_BACK = 0x01000000,
-
-    // User used the address bar to trigger this navigation.
-    FROM_ADDRESS_BAR = 0x02000000,
-
-    // User is navigating to the home page.
-    HOME_PAGE = 0x04000000,
-
-    // The beginning of a navigation chain.
-    CHAIN_START = 0x10000000,
-
-    // The last transition in a redirect chain.
-    CHAIN_END = 0x20000000,
-
-    // Redirects caused by JavaScript or a meta refresh tag on the page.
-    CLIENT_REDIRECT = 0x40000000,
-
-    // Redirects sent from the server by HTTP headers. It might be nice to
-    // break this out into 2 types in the future, permanent or temporary, if we
-    // can get that information from WebKit.
-    SERVER_REDIRECT = 0x80000000,
-
-    // Used to test whether a transition involves a redirect.
-    IS_REDIRECT_MASK = 0xC0000000,
-
-    // General mask defining the bits used for the qualifiers.
-    QUALIFIER_MASK = 0xFFFFFF00
-  };
-
-  // The type used for the bitfield.
-  typedef unsigned int Type;
-
-  static bool ValidType(int32 type) {
-    Type t = StripQualifier(static_cast<Type>(type));
-    return (t <= LAST_CORE);
-  }
-
-  static Type FromInt(int32 type);
-
-  // Returns true if the given transition is a top-level frame transition, or
-  // false if the transition was for a subframe.
-  static bool IsMainFrame(Type type) {
-    int32 t = StripQualifier(type);
-    return (t != AUTO_SUBFRAME && t != MANUAL_SUBFRAME);
-  }
-
-  // Returns whether a transition involves a redirection
-  static bool IsRedirect(Type type) {
-    return (type & IS_REDIRECT_MASK) != 0;
-  }
-
-  // Simplifies the provided transition by removing any qualifier
-  static Type StripQualifier(Type type) {
-    return static_cast<Type>(type & ~QUALIFIER_MASK);
-  }
-
-  // Return the qualifier
-  static int32 GetQualifier(Type type) {
-    return type & QUALIFIER_MASK;
-  }
-
-  // Return a string version of the core type values.
-  static const char* CoreTransitionString(Type type);
-};
-
-#endif  // CONTENT_COMMON_PAGE_TRANSITION_TYPES_H_