Introduce ActiveScriptController; track active extension scripts

extensions/common/permissions/permissions_data.h

Index: extensions/common/permissions/permissions_data.h
diff --git a/extensions/common/permissions/permissions_data.h b/extensions/common/permissions/permissions_data.h
index ee1715df6c97f0e091bba99af83ea4119da08675..5c0652c5bb7c2ea6eeb660f784881fb03beadfc5 100644
--- a/extensions/common/permissions/permissions_data.h
+++ b/extensions/common/permissions/permissions_data.h
@@ -177,6 +177,10 @@ class PermissionsData {
                                     int tab_id,
                                     std::string* error);
 
+  // Returns true if the user should be alerted to the fact that the given
+  // |extension| is running a script.

[not at google - send to devlin, 2014/05/08 20:47:09]

shorter: Returns true if the user should be alerted that |extension| is running
a script.

[Devlin, 2014/05/08 23:01:00]

Yay for 20 characters less!

[not at google - send to devlin, 2014/05/08 23:33:19]

Think of all the people that have to read 20 fewer characters.

+  static bool RequiresActionForScriptExecution(const Extension* extension);
+
   // Parse the permissions of a given extension in the initialization process.
   bool ParsePermissions(Extension* extension, base::string16* error);