Allow apps with background pages to request process-per-app-instance.

chrome/common/extensions/extension.h

Index: chrome/common/extensions/extension.h
diff --git a/chrome/common/extensions/extension.h b/chrome/common/extensions/extension.h
index f95cf18ccb55d958f634d6f881c15233c623c5f8..b844bcf3f6910d02fc86a477deb9e83ed991edd7 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -556,6 +556,9 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   bool has_background_page() const {
     return background_url_.is_valid() || !background_scripts_.empty();
   }
+  bool allow_background_js_access() const {
+    return allow_background_js_access_;
+  }
   const std::vector<std::string>& background_scripts() const {
     return background_scripts_;
   }
@@ -689,6 +692,9 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   bool LoadBackgroundPersistent(
       const ExtensionAPIPermissionSet& api_permissions,
       string16* error);
+  bool LoadBackgroundAllowJsAccess(
+      const ExtensionAPIPermissionSet& api_permissions,
+      string16* error);
 
   // Helper method that loads a UserScript object from a
   // dictionary in the content_script list of the manifest.
@@ -842,6 +848,12 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   // load on-demand (when it needs to handle an event). Defaults to true.
   bool background_page_persists_;
 
+  // True if the background page can be scripted by pages of the app or
+  // extension, in which case all such pages must run in the same process.
+  // False if such pages are not permitted to script the background page,
+  // allowing them to run in different processes.
+  bool allow_background_js_access_;
+
   // Optional URL to a page for setting options/preferences.
   GURL options_url_;