Install platform apps into a separate data directory

chrome/browser/web_applications/web_app_mac.h

Index: chrome/browser/web_applications/web_app_mac.h
diff --git a/chrome/browser/web_applications/web_app_mac.h b/chrome/browser/web_applications/web_app_mac.h
index 603bc0ccd81a71a942d63302d2876a5b4520d1ad..790f2bc0f104c3bed4d0cde82dea40acd0075fe1 100644
--- a/chrome/browser/web_applications/web_app_mac.h
+++ b/chrome/browser/web_applications/web_app_mac.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_WEB_APPLICATIONS_WEB_APP_MAC_H_
 #pragma once
 
+#include "base/file_path.h"
 #include "chrome/browser/shell_integration.h"
 
 namespace web_app {
@@ -15,7 +16,9 @@ namespace web_app {
 class WebAppShortcutCreator {
  public:
   // Creates a new shortcut based on information in |shortcut_info|.
+  // The shortcut store its data directory in |web_app_path|.
   explicit WebAppShortcutCreator(
+      const FilePath& web_app_path,
       const ShellIntegration::ShortcutInfo& shortcut_info);
   virtual ~WebAppShortcutCreator();
 
@@ -36,6 +39,10 @@ class WebAppShortcutCreator {
   bool UpdateIcon(const FilePath& app_path) const;
 
  private:
+  // Path to the app's data directory. For example:
+  // ~/Library/Application Support/Chromium/Default/Web Applications/_crx_abc/
+  FilePath web_app_path_;
+
   // Information about the app.
   ShellIntegration::ShortcutInfo info_;
 };