Add early-injection capability to user scripts. I haven't yet

chrome/common/extensions/user_script_unittest.cc

Index: chrome/common/extensions/user_script_unittest.cc
diff --git a/chrome/common/extensions/user_script_unittest.cc b/chrome/common/extensions/user_script_unittest.cc
index 02662606d138f157db9d369f5421120a93cfd188..26bf355d063eebf8764ab1074e0439cff5969bd2 100644
--- a/chrome/common/extensions/user_script_unittest.cc
+++ b/chrome/common/extensions/user_script_unittest.cc
@@ -78,6 +78,7 @@ TEST(UserScriptTest, Pickle) {
 
   UserScript script1;
   script1.set_url(GURL("chrome-user-script:/foo.user.js"));
+  script1.set_run_location(UserScript::DOCUMENT_START);
   script1.add_url_pattern(pattern1);
   script1.add_url_pattern(pattern2);
 
@@ -99,3 +100,12 @@ TEST(UserScriptTest, Pickle) {
               script2.url_patterns()[i].GetAsString());
   }
 }
+
+TEST(UserScriptTest, Defaults) {

[Matt Perry, 2009/02/11 19:28:46]

Do these defaults need to be this way for compatibility?  If so, add a comment. 
Otherwise, it seems strange that you have a unit test for variable
initialization :).

+  UserScript script;
+  ASSERT_EQ(FILE_PATH_LITERAL(""), script.path().value());
+  ASSERT_EQ("", script.url().spec());
+  ASSERT_EQ(0, script.url_patterns().size());
+  ASSERT_EQ(0, script.globs().size());
+  ASSERT_EQ(UserScript::DOCUMENT_END, script.run_location());
+}