Install platform apps into a separate data directory

chrome/common/mac/app_mode_common.h

Index: chrome/common/mac/app_mode_common.h
diff --git a/chrome/common/mac/app_mode_common.h b/chrome/common/mac/app_mode_common.h
index 04851ded9db260880a4ef92d462375280f55d3a4..930d22d946b2e80881d1439455723c4da35bebdc 100644
--- a/chrome/common/mac/app_mode_common.h
+++ b/chrome/common/mac/app_mode_common.h
@@ -39,6 +39,9 @@ extern NSString* const kCrAppModeShortcutURLKey;
 // Key for the app user data directory.
 extern NSString* const kCrAppModeUserDataDirKey;
 
+// Key for the app's extension path.
+extern NSString* const kCrAppModeExtensionPathKey;
+
 // Current major/minor version numbers of |ChromeAppModeInfo| (defined below).
 const unsigned kCurrentChromeAppModeInfoMajorVersion = 1;
 const unsigned kCurrentChromeAppModeInfoMinorVersion = 0;
@@ -85,6 +88,9 @@ struct ChromeAppModeInfo {
 
   // Path to the app's user data directory.
   FilePath user_data_dir;
+
+  // Path to the app's extension.
+  FilePath extension_path;
 };
 
 }  // namespace app_mode