Initial work on making extensions work in incognito mode.

chrome/browser/extensions/user_script_master.h

Index: chrome/browser/extensions/user_script_master.h
diff --git a/chrome/browser/extensions/user_script_master.h b/chrome/browser/extensions/user_script_master.h
index 0423305dff9418999ef7e37a64c2b427dc584bba..19562f0e28747839f701131063153db9e2fcb412 100644
--- a/chrome/browser/extensions/user_script_master.h
+++ b/chrome/browser/extensions/user_script_master.h
@@ -17,6 +17,7 @@ namespace base {
 class StringPiece;
 }
 
+class Extension;
 class Profile;
 
 // Manages a segment of shared memory that contains the user scripts the user
@@ -46,6 +47,11 @@ class UserScriptMaster : public base::RefCountedThreadSafe<UserScriptMaster>,
   // Returns the path to the directory user scripts are stored in.
   FilePath user_script_dir() const { return user_script_dir_; }
 
+  // Note: this is only for testing. This will reload the scripts associated
+  // with the given extension. This is only temporary until we get better
+  // machinery in place for toggling incognito-enabled extensions.
+  void ReloadExtensionForTesting(Extension* extension);
+
  protected:
   friend class base::RefCountedThreadSafe<UserScriptMaster>;