Fix regression where we stopped running content scripts in
extension processes.

BUG=29621

Review URL: http://codereview.chromium.org/505012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@34668 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extensions_service.cc b/chrome/browser/extensions/extensions_service.cc
index 578b8ef..99a97f2a 100644
--- a/chrome/browser/extensions/extensions_service.cc
+++ b/chrome/browser/extensions/extensions_service.cc
@@ -643,10 +643,10 @@
 }
 
 void ExtensionsService::UpdateActiveExtensionsInCrashReporter() {
-  std::vector<std::string> extension_ids;
+  std::set<std::string> extension_ids;
   for (size_t i = 0; i < extensions_.size(); ++i) {
     if (!extensions_[i]->IsTheme())
-      extension_ids.push_back(extensions_[i]->id());
+      extension_ids.insert(extensions_[i]->id());
   }
 
   child_process_logging::SetActiveExtensions(extension_ids);