Added check to prevent extensions from injecting scrips into other extensions

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 d5070bdfb9f2cbe05f5c315031f6c323f0c4729d..5d0b110e506f18396cd00860a38f6325f2ee5301 100644
--- a/chrome/common/extensions/extension.h
+++ b/chrome/common/extensions/extension.h
@@ -532,6 +532,7 @@ class Extension : public base::RefCountedThreadSafe<Extension> {
   // This method is also aware of certain special pages that extensions are
   // usually not allowed to run script on.
   bool CanExecuteScriptOnPage(const GURL& page_url,
+                              const GURL& top_frame_url,

[abarth-chromium, 2012/08/22 00:54:19]

How does a page_url differ from a top_frame_url?  Maybe these terms are used
differently here than they are in WebKit, but Frames and Pages don't have URLs,
Documents have URLs.  Perhaps these should be called document_url and
top_document_url respectively?

[zel, 2012/08/22 01:39:20]

Done.

                               int tab_id,
                               const UserScript* script,
                               std::string* error) const;