Implement chromium.self in content scripts, fix bugs

chrome/test/data/extensions/content_script_inject/manifest.json

Index: chrome/test/data/extensions/content_script_inject/manifest.json
diff --git a/chrome/test/data/extensions/content_script_inject/manifest.json b/chrome/test/data/extensions/content_script_inject/manifest.json
new file mode 100755
index 0000000000000000000000000000000000000000..8214fb605e9067d668787d7c660e78f31bd5acb3
--- /dev/null
+++ b/chrome/test/data/extensions/content_script_inject/manifest.json
@@ -0,0 +1,21 @@
+{
+  "id": "00123456789ABCDEF0123456789ABCDEF0123456",
+  "version": "1.0.0.0",
+  "name": "User script inject",
+  "content_scripts": [
+    {
+      "matches": ["file://*/content_script_inject_page.html"],
+      "css": ["script1.css"],
+      "js": ["js_test.js", "script1a.js", "script1b.js"]
+    },
+    {
+      "matches": ["file://*/content_script_inject_page.html"],
+      "js": ["js_test.js", "script2.js"]
+    },
+    {
+      "matches": ["file://*/content_script_inject_page.html"],
+      "js": ["js_test.js", "script3.js"],
+      "run_at": "document_start"  
+    }
+  ]
+}