Have the Debugger extension api check that it has access to the tab

extensions/common/url_pattern.cc

Index: extensions/common/url_pattern.cc
diff --git a/extensions/common/url_pattern.cc b/extensions/common/url_pattern.cc
index c7a3711e039fee6a7eb5b0f1c79ea7e111b2dd3f..ee7d16467107525c13ced6ae59469947d3099ef2 100644
--- a/extensions/common/url_pattern.cc
+++ b/extensions/common/url_pattern.cc
@@ -109,6 +109,15 @@ std::string StripTrailingWildcard(const std::string& path) {
 
 }  // namespace
 
+// static
+bool URLPattern::IsValidSchemeForExtensions(const std::string& scheme) {
+  for (size_t i = 0; i < arraysize(kValidSchemes); ++i) {
+    if (scheme == kValidSchemes[i])
+      return true;
+  }
+  return false;
+}
+
 URLPattern::URLPattern()
     : valid_schemes_(SCHEME_NONE),
       match_all_urls_(false),