Prevent duplicate content script injection defined in manifest.json

chrome/test/data/extensions/api_test/content_scripts/duplicate_script_injection/manifest.json

Index: chrome/test/data/extensions/api_test/content_scripts/duplicate_script_injection/manifest.json
diff --git a/chrome/test/data/extensions/api_test/content_scripts/duplicate_script_injection/manifest.json b/chrome/test/data/extensions/api_test/content_scripts/duplicate_script_injection/manifest.json
new file mode 100644
index 0000000000000000000000000000000000000000..70ad447d47ff44e709b93942fa7c9933d18b8b56
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/content_scripts/duplicate_script_injection/manifest.json
@@ -0,0 +1,26 @@
+{
+  "name": "duplicate script injection",
+  "version": "0.0.1",
+  "manifest_version": 2,
+  "description": "Tests that content scripts assigned to two overlapping url matches are not injected twice. Note this can be extended to N matches",
+  "background": {
+  },
+  "content_scripts": [
+    {
+      "matches": ["*://*.google.com/*"],
+      "js": ["test.js"],
+      "css": ["test.css"],
+      "run_at": "document_end"
+    },
+    {
+      "matches": ["*://maps.google.com/*"],
+      "js": ["test.js"],
+      "css": ["test.css"],
+      "run_at": "document_end"
+    }
+  ],
+  "permissions": [

[Devlin, 2016/07/11 23:45:50]

Do we need these permissions?

[catmullings, 2016/07/12 22:23:26]

Done.

[catmullings, 2016/07/12 22:23:26]

Nope. Removing them. 

+    "http://*/",
+    "https://*/"
+  ]
+}