Adding `content_security_policy` to the "Mappy" sample.

chrome/common/extensions/docs/samples.json

 {
   "api": {
     "chrome.bookmarks.create": "bookmarks.html#method-create",
     "chrome.bookmarks.export": "bookmarks.html#method-export",
     "chrome.bookmarks.get": "bookmarks.html#method-get",
     "chrome.bookmarks.getChildren": "bookmarks.html#method-getChildren",
     "chrome.bookmarks.getRecent": "bookmarks.html#method-getRecent",
     "chrome.bookmarks.getSubTree": "bookmarks.html#method-getSubTree",
     "chrome.bookmarks.getTree": "bookmarks.html#method-getTree",
     "chrome.bookmarks.import": "bookmarks.html#method-import",
@@ skipping 1408 matching lines @@
         "page_action",
         "popup",
         "tabs"
       ],
       "icon": "icon.png",
       "id": "ec97ec20ca2f095d081e39f1565fc12af09ef067",
       "name": "Mappy",
       "packaged_app": false,
       "path": "examples\/extensions\/mappy\/",
       "protocols": [
-        "http:\/\/"
+        "https:\/\/",
+        "https:\/\/"
       ],
       "search_string": "MAPPY FINDS ADDRESSES IN THE WEB PAGE YOURE ON AND POPS UP A MAP WINDOW. BACKGROUND_PAGE PAGE_ACTION POPUP TABS CHROME.EXTENSION.GETBACKGROUNDPAGE CHROME.EXTENSION.ONREQUEST CHROME.PAGEACTION.HIDE CHROME.PAGEACTION.SETTITLE CHROME.PAGEACTION.SHOW CHROME.TABS.GET CHROME.TABS.GETSELECTED CHROME.TABS.ONSELECTIONCHANGED CHROME.TABS.ONUPDATED CHROME.TABS.SENDREQUEST",
       "source_files": [
         "background.html",
+        "background.js",
         "manifest.json",
         "mappy_content_script.js",
-        "popup.html"
+        "popup.css",
+        "popup.html",
+        "popup.js"
       ],
-      "source_hash": "81cf2d3975d7df8b58e5226c5b2b6df026446511",
+      "source_hash": "175f010b7eacb72207b7018732d3e6dca4e8d164",
       "zip_path": "examples\/extensions\/mappy.zip"
     },
     {
       "api_calls": [
         "chrome.browserAction.onClicked",
         "chrome.tabs.get",
         "chrome.tabs.getAllInWindow",
         "chrome.tabs.move",
         "chrome.windows.get",
         "chrome.windows.getAll",
@@ skipping 888 matching lines @@
       "source_files": [
         "manifest.json",
         "popup.html",
         "sample.css"
       ],
       "source_hash": "c8bfc2b60f25c24dc3c5aaf75dd635c9419df66d",
       "zip_path": "examples\/api\/extension\/isAllowedAccess.zip"
     }
   ]
 }