Move UserScript and related into extensions namespace

chrome/browser/extensions/user_script_master_unittest.cc

Index: chrome/browser/extensions/user_script_master_unittest.cc
diff --git a/chrome/browser/extensions/user_script_master_unittest.cc b/chrome/browser/extensions/user_script_master_unittest.cc
index 8ec0ba7fda7d86782f7a0f9607addefaae50c6c7..521ec29fcb21e07651492bd915a74d6c8fbebb6e 100644
--- a/chrome/browser/extensions/user_script_master_unittest.cc
+++ b/chrome/browser/extensions/user_script_master_unittest.cc
@@ -30,6 +30,8 @@ static void AddPattern(URLPatternSet* extent, const std::string& pattern) {
 
 }
 
+namespace extensions {
+
 // Test bringing up a master on a specific directory, putting a script
 // in there, etc.
 
@@ -272,3 +274,5 @@ TEST_F(UserScriptMasterTest, LeaveBOMNotAtTheBeginning) {
 
   EXPECT_EQ(content, user_scripts[0].js_scripts()[0].GetContent().as_string());
 }
+
+}  // namespace extensions