Add UMA for --app-shim-error.

chrome/common/mac/app_mode_common.mm

 // Copyright (c) 2012 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/mac/app_mode_common.h"
 
 #include "base/file_util.h"
 
 namespace app_mode {
 
 const char kAppShimSocketShortName[] = "Socket";
 const char kAppShimSocketSymlinkName[] = "App Shim Socket";
 
 const char kAppListModeId[] = "app_list";
 
 const char kLaunchedByChromeProcessId[] = "launched-by-chrome-process-id";
 const char kLaunchedForTest[] = "launched-for-test";
 const char kLaunchedAfterRebuild[] = "launched-after-rebuild";
 
 const char kAppShimError[] = "app-shim-error";
+const char kAppShimErrorDetail[] = "app-shim-error-detail";
+const char kAppShimErrorDetail32Bit[] = "32-bit";
+const char kAppShimErrorDetail64Bit[] = "64-bit";
 
 NSString* const kCFBundleDocumentTypesKey = @"CFBundleDocumentTypes";
 NSString* const kCFBundleTypeExtensionsKey = @"CFBundleTypeExtensions";
 NSString* const kCFBundleTypeIconFileKey = @"CFBundleTypeIconFile";
 NSString* const kCFBundleTypeNameKey = @"CFBundleTypeName";
 NSString* const kCFBundleTypeMIMETypesKey = @"CFBundleTypeMIMETypes";
 NSString* const kCFBundleTypeRoleKey = @"CFBundleTypeRole";
 NSString* const kBundleTypeRoleViewer = @"Viewer";
 
 NSString* const kCFBundleDisplayNameKey = @"CFBundleDisplayName";
@@ skipping 26 matching lines @@
 
 void VerifySocketPermissions(const base::FilePath& socket_path) {
   CHECK(base::PathIsWritable(socket_path));
   base::FilePath socket_dir = socket_path.DirName();
   int socket_dir_mode = 0;
   CHECK(base::GetPosixFilePermissions(socket_dir, &socket_dir_mode));
   CHECK_EQ(0700, socket_dir_mode);
 }
 
 }  // namespace app_mode