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

chrome/common/chrome_version_info_mac.mm

+// 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.
+
+#include "chrome/common/chrome_version_info.h"
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/basictypes.h"
+#include "base/sys_string_conversions.h"
+
+namespace chrome {
+
+// static
+std::string VersionInfo::GetVersionStringModifier() {
+#if defined(GOOGLE_CHROME_BUILD)
+  // Use the main application bundle and not the framework bundle. Keystone
+  // keys don't live in the framework.
+  NSBundle* bundle = [NSBundle mainBundle];
+  NSString* channel = [bundle objectForInfoDictionaryKey:@"KSChannelID"];
+
+  // Only ever return "", "unknown", "beta", "dev", or "canary" in a branded
+  // build.
+  if (![bundle objectForInfoDictionaryKey:@"KSProductID"]) {
+    // This build is not Keystone-enabled, it can't have a channel.
+    channel = @"unknown";
+  } else if (!channel) {
+    // For the stable channel, KSChannelID is not set.
+    channel = @"";
+  } else if ([channel isEqual:@"beta"] ||
+             [channel isEqual:@"dev"] ||
+             [channel isEqual:@"canary"]) {
+    // do nothing.
+  } else {
+    channel = @"unknown";
+  }
+
+  return base::SysNSStringToUTF8(channel);
+#else
+  return std::string();
+#endif
+}
+
+// static
+VersionInfo::Channel VersionInfo::GetChannel() {
+#if defined(GOOGLE_CHROME_BUILD)
+  std::string channel = GetVersionStringModifier();
+  if (channel.empty()) {
+    return CHANNEL_STABLE;
+  } else if (channel == "beta") {
+    return CHANNEL_BETA;
+  } else if (channel == "dev") {
+    return CHANNEL_DEV;
+  } else if (channel == "canary") {
+    return CHANNEL_CANARY;
+  }
+#endif
+
+  return CHANNEL_UNKNOWN;
+}
+
+}  // namespace chrome