Install platform apps into a separate data directory

chrome/browser/web_applications/web_app.h

Index: chrome/browser/web_applications/web_app.h
diff --git a/chrome/browser/web_applications/web_app.h b/chrome/browser/web_applications/web_app.h
index 67c839e773f66c8ff032d72f025a325375590d68..cf686c4af91dada838ad2ee38ac43d396e91d123 100644
--- a/chrome/browser/web_applications/web_app.h
+++ b/chrome/browser/web_applications/web_app.h
@@ -16,6 +16,11 @@
 
 namespace web_app {
 
+// Returns data directory for given web app url.
+FilePath GetWebAppDataDirectory(const FilePath& profile_path,
+                                const std::string& extension_id,
+                                const GURL& url);
+
 // Compute a deterministic name based on data in the shortcut_info.
 std::string GenerateApplicationNameFromInfo(
     const ShellIntegration::ShortcutInfo& shortcut_info);
@@ -67,9 +72,6 @@ namespace internals {
 bool CheckAndSaveIcon(const FilePath& icon_file, const SkBitmap& image);
 #endif
 
-FilePath GetWebAppDataDirectory(const FilePath& root_dir,
-                                const ShellIntegration::ShortcutInfo& info);
-
 // Does the actual job of creating a shortcut (see CreateShortcut() above).
 // This must be called on the file thread.
 void CreateShortcutTask(const FilePath& web_app_path,