Move GetVersionStringModifier() and GetChannel() from platform_util_* to chrome_version_info_*

chrome/common/chrome_version_info.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 CHROME_COMMON_CHROME_VERSION_INFO_H_
 #define CHROME_COMMON_CHROME_VERSION_INFO_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 
 class FileVersionInfo;
 
 namespace chrome {
 
 // An instance of chrome::VersionInfo has information about the
 // current running build of Chrome.
 class VersionInfo {
  public:
+  // The possible channels for an installation, from most fun to most stable.
+  enum Channel {
+    CHANNEL_UNKNOWN = 0,  // Probably blue
+    CHANNEL_CANARY,       // Yellow
+    CHANNEL_DEV,          // Technicolor
+    CHANNEL_BETA,         // Rainbow
+    CHANNEL_STABLE        // Full-spectrum
+  };
+
   VersionInfo();
   ~VersionInfo();
 
   // In the rare case where we fail to get the version info,
   // is_valid() will return false.  The other functions will return
   // the empty string in this case, so it's not harmful if you don't
   // check is_valid().
   bool is_valid() const;
 
   // E.g. "Chromium" or "Google Chrome".
   std::string Name() const;
 
   // Version number, e.g. "6.0.490.1".
   std::string Version() const;
 
   // The SVN revision of this release.  E.g. "55800".
   std::string LastChange() const;
 
-  // OS type. E.g. "Windows", "Linux", "FreeBSD", ...
-  std::string OSType() const;
-
   // Whether this is an "official" release of the current Version():
   // whether knowing Version() is enough to completely determine what
   // LastChange() is.
   bool IsOfficialBuild() const;
 
+  // OS type. E.g. "Windows", "Linux", "FreeBSD", ...
+  std::string OSType() const;
+
+  // Returns a human-readable modifier for the version string. For a branded
+  // build, this modifier is the channel ("canary", "dev", or "beta", but ""
+  // for stable). On Windows, this may be modified with additional information
+  // after a hyphen. For multi-user installations, it will return "canary-m",
+  // "dev-m", "beta-m", and for a stable channel multi-user installation, "m".
+  // In branded builds, when the channel cannot be determined, "unknown" will
+  // be returned. In unbranded builds, the modifier is usually an empty string
+  // (""), although on Linux, it may vary in certain distributions.
+  // GetVersionStringModifier() is intended to be used for display purposes.
+  // To simply test the channel, use GetChannel().
+  static std::string GetVersionStringModifier();
+
+  // Returns the channel for the installation. In branded builds, this will be
+  // CHANNEL_STABLE, CHANNEL_BETA, CHANNEL_DEV, or CHANNEL_CANARY. In unbranded
+  // builds, or in branded builds when the channel cannot be determined, this
+  // will be CHANNEL_UNKNOWN.
+  static Channel GetChannel();
+
  private:
 #if defined(OS_WIN) || defined(OS_MACOSX)
   scoped_ptr<FileVersionInfo> version_info_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(VersionInfo);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_COMMON_CHROME_VERSION_INFO_H_