Mac: app mode loader (shim).

chrome/common/chrome_paths_mac.mm

 // Copyright (c) 2006-2008 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_paths_internal.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/base_paths.h"
 #include "base/logging.h"
 #include "base/mac_util.h"
 #include "base/path_service.h"
 #include "chrome/common/chrome_constants.h"
 
+namespace {
+const FilePath* g_override_versioned_directory = NULL;
+}  // namespace
+
 namespace chrome {
 
 bool GetDefaultUserDataDirectory(FilePath* result) {
   bool success = false;
   if (result && PathService::Get(base::DIR_APP_DATA, result)) {
 #if defined(GOOGLE_CHROME_BUILD)
     *result = result->Append("Google").Append("Chrome");
 #else
     *result = result->Append("Chromium");
 #endif
@@ skipping 21 matching lines @@
 
 bool GetUserDownloadsDirectory(FilePath* result) {
   return mac_util::GetUserDirectory(NSDownloadsDirectory, result);
 }
 
 bool GetUserDesktop(FilePath* result) {
   return mac_util::GetUserDirectory(NSDesktopDirectory, result);
 }
 
 FilePath GetVersionedDirectory() {
+  if (g_override_versioned_directory)
+    return *g_override_versioned_directory;
+
   // Start out with the path to the running executable.
   FilePath path;
   PathService::Get(base::FILE_EXE, &path);
 
   // One step up to MacOS, another to Contents.
   path = path.DirName().DirName();
   DCHECK_EQ(path.BaseName().value(), "Contents");
 
   if (mac_util::IsBackgroundOnlyProcess()) {
     // path identifies the helper .app's Contents directory in the browser
     // .app's versioned directory.  Go up two steps to get to the browser
     // .app's versioned directory.
     path = path.DirName().DirName();
     DCHECK_EQ(path.BaseName().value(), kChromeVersion);
   } else {
     // Go into the versioned directory.
     path = path.Append("Versions").Append(kChromeVersion);
   }
 
   return path;
 }
 
+void SetOverrideVersionedDirectory(const FilePath* path) {
+  if (path != g_override_versioned_directory) {
+    delete g_override_versioned_directory;
+    g_override_versioned_directory = path;
+  }
+}
+
 FilePath GetFrameworkBundlePath() {
   // It's tempting to use +[NSBundle bundleWithIdentifier:], but it's really
   // slow (about 30ms on 10.5 and 10.6), despite Apple's documentation stating
   // that it may be more efficient than +bundleForClass:.  +bundleForClass:
   // itself takes 1-2ms.  Getting an NSBundle from a path, on the other hand,
   // essentially takes no time at all, at least when the bundle has already
   // been loaded as it will have been in this case.  The FilePath operations
   // needed to compute the framework's path are also effectively free, so that
   // is the approach that is used here.  NSBundle is also documented as being
   // not thread-safe, and thread safety may be a concern here.
 
   // The framework bundle is at a known path and name from the browser .app's
   // versioned directory.
   return GetVersionedDirectory().Append(kFrameworkName);
 }
 
 }  // namespace chrome