Atomic UserScript ID generation

chrome/common/extensions/manifest_handlers/content_scripts_handler.h

Index: chrome/common/extensions/manifest_handlers/content_scripts_handler.h
diff --git a/chrome/common/extensions/manifest_handlers/content_scripts_handler.h b/chrome/common/extensions/manifest_handlers/content_scripts_handler.h
index 6b7e4466b25d422e23eeee11b918e50243895eb0..5c1c71e8e8fbcdf9be88656013b90c5e083333b4 100644
--- a/chrome/common/extensions/manifest_handlers/content_scripts_handler.h
+++ b/chrome/common/extensions/manifest_handlers/content_scripts_handler.h
@@ -40,6 +40,8 @@ class ContentScriptsHandler : public ManifestHandler {
   ContentScriptsHandler();
   virtual ~ContentScriptsHandler();
 
+  static int64 GetNextUserScriptID();

[not at google - send to devlin, 2014/08/21 01:39:32]

GenerateUserScriptID()?

This is the sort of change that needs context, but I'm guessing you'll be
calling this from somewhere other than ContentScriptsHandler. In that case I
think you're better off exposing a public method like this on UserScript, not
here.

+
   virtual bool Parse(Extension* extension, base::string16* error) OVERRIDE;
   virtual bool Validate(const Extension* extension,
                         std::string* error,