Remove .html extension from links

chrome/common/extensions/docs/templates/json/intro_tables.json

 {
   "alarms": {
     "Learn More": [
       {
-        "link": "event_pages.html",
+        "link": "event_pages",
         "text": "Event Pages"
       }
     ]
   },
   "app_runtime": {
     "Learn More": [
       {
-        "link": "app_lifecycle.html",
+        "link": "app_lifecycle",
         "text": "Manage App Lifecycle"
       },
       {
         "link": "https://developers.google.com/live/shows/10291095/",
         "text": "Chrome Office Hours: Introduction to Chrome Apps"
       }
     ]
   },
   "app_window": {
     "Learn More": [
       {
-        "link": "about_apps.html#look",
+        "link": "about_apps#look",
         "text": "How they look"
       },
       {
-        "link": "app_lifecycle.html",
+        "link": "app_lifecycle",
         "text": "Manage App Lifecycle"
       },
       {
         "link": "https://developers.google.com/live/shows/9118010/",
         "text": "Chrome Apps Office Hours: Building Awesome Multi-window Apps"
       }
     ]
   },
   "bluetooth": {
     "Learn More": [
       {
-        "link": "app_bluetooth.html",
+        "link": "app_bluetooth",
         "text": "Bluetooth"
       }
     ]
   },
   "cookies": {
     "Permissions": [
       {
         "class": "code",
         "text": "\"cookies\""
       },
       {
-        "link": "declare_permissions.html#host-permissions",
+        "link": "declare_permissions#host-permissions",
         "text": "host permissions"
       }
     ]
   },
   "declarativeContent": {
     "Learn More": [
       {
-        "link": "events.html",
+        "link": "events",
         "text": "Declarative Events"
       },
       {
-        "link": "activeTab.html",
+        "link": "activeTab",
         "text": "activeTab"
       }
     ]
   },
   "declarativeWebRequest": {
     "Permissions": [
       {
         "class": "code",
         "text": "\"declarativeWebRequest\""
       },
       {
-        "link": "declare_permissions.html#host-permissions",
+        "link": "declare_permissions#host-permissions",
         "text": "host permissions"
       }
     ]
   },
   "downloads": {
     "Permissions": [
       {
         "class": "code",
         "text": "\"downloads\""
       }
     ]
   },
   "fileSystem": {
     "Permissions": [
       {
         "class": "code",
         "text": "\"fileSystem\""
       },
       {
         "class": "code",
         "text": "{\"fileSystem\": [\"write\"]}"
       },
       {
         "class": "code",
         "text": "{\"fileSystem\": [\"write\", \"retainEntries\", \"directory\"]}"
       }
     ],
     "Learn More": [
       {
-        "link": "app_storage.html",
+        "link": "app_storage",
         "text": "Manage Data"
       },
       {
-        "link": "angular_framework.html",
+        "link": "angular_framework",
         "text": "Build Apps with AngularJS"
       },
       {
         "link": "https://developers.google.com/live/shows/7320022-1001/",
         "text": "Chrome Apps Office Hours: TextDrive and AngularJS"
       }
     ]
   },
   "gcm": {
     "Learn More": [
       {
-        "link": "cloudMessagingV2.html",
+        "link": "cloudMessagingV2",
         "text": "Google Cloud Messaging"
       }
     ]
   },
   "identity": {
     "Learn More": [
       {
-        "link": "app_identity.html",
+        "link": "app_identity",
         "text": "Identify User"
       }
     ]
   },
   "mediaGalleries": {
     "Permissions": [
       {
         "class": "code",
         "text": "{\"mediaGalleries\": [\"accessType1\", \"accessType2\", ...]}"
       },
@@ skipping 16 matching lines @@
     "Learn More": [
       {
         "link": "https://developers.google.com/live/shows/83992232-1001/",
         "text": "Chrome Apps Office Hours: Rich Notifications"
       }
     ]
   },
   "permissions": {
     "Learn More": [
       {
-        "link": "declare_permissions.html",
+        "link": "declare_permissions",
         "text": "Declaring permissions"
       }
     ]
   },
   "pushMessaging": {
     "Learn More": [
       {
-        "link": "cloudMessaging.html",
+        "link": "cloudMessaging",
         "text": "Google Cloud Messaging for Chrome"
       },
       {
-        "link": "gcm_server.html",
+        "link": "gcm_server",
         "text": "API Reference for GCM service"
       }
     ]
   },
   "runtime": {
     "Learn More": [
       {
-        "link": "app_lifecycle.html",
+        "link": "app_lifecycle",
         "text": "Manage App Lifecycle"
       },
       {
-        "link": "event_pages.html",
+        "link": "event_pages",
         "text": "Event Pages"
       }
     ]
   },
   "serial": {
     "Learn More": [
       {
-        "link": "app_usb.html",
+        "link": "app_usb",
         "text": "Accessing Hardware Devices"
       }
     ]
   },
   "socket": {
     "Permissions": [
       {
         "class": "code",
         "text": "{\"socket\": [\"rule1\", \"rule2\"]}"
       },
       {
         "partial": "intro_tables/socket_permissions.html"
       }
     ],
     "Learn More": [
       {
-        "link": "app_network.html",
+        "link": "app_network",
         "text": "Network Communications"
       },
       {
-        "link": "sencha_framework.html",
+        "link": "sencha_framework",
         "text": "Build Apps with Sencha ExtJS"
       },
       {
         "link": "https://developers.google.com/live/shows/7320022-5001/",
         "text": "Chrome Apps Office Hours: Networking APIs"
       },
       {
         "link": "https://developers.google.com/live/shows/7320022-2001/",
         "text": "Chrome Apps Office Hours: Controlling an AR ParrotDrone"
       }
     ]
   },
   "storage": {
     "Learn More": [
       {
         "link": "https://developers.google.com/live/shows/7320022/",
         "text": "Chrome Apps Office Hours: Chrome Storage APIs"
       },
       {
         "link": "https://developers.google.com/live/shows/7320022-1/",
         "text": "Chrome Apps Office Hours: Storage API Deep Dive"
       }
     ]
   },
   "syncFileSystem": {
     "Learn More": [
       {
-        "link": "app_storage.html",
+        "link": "app_storage",
         "text": "Manage Data"
       },
       {
         "link": "https://developers.google.com/live/shows/83992232-2001/",
         "text": "Chrome Office Hours: Synched File System"
       }
     ]
   },
   "tabs": {
     "Permissions": [
       {
         "partial": "intro_tables/tabs_permissions.html"
       }
     ]
   },
   "tts": {
     "Learn More": [
       {
         "link": "https://developers.google.com/live/shows/7320022-7001/",
         "text": "Chrome Office Hours: Text to Speech API"
       }
     ]
   },
   "usb": {
     "Learn More": [
       {
-        "link": "app_usb.html",
+        "link": "app_usb",
         "text": "Accessing Hardware Devices"
       }
     ]
   },
   "webRequest": {
     "Permissions": [
       {
         "class": "code",
         "text": "\"webRequest\""
       },
       {
-        "link": "declare_permissions.html#host-permissions",
+        "link": "declare_permissions#host-permissions",
         "text": "host permissions"
       }
     ]
   },
   "webstore": {
     "Learn More": [
       {
         "link": "https://developers.google.com/chrome/web-store/docs/inline_installation",
         "text": "Using Inline Installation"
       }
     ]
   },
   "windows": {
     "Permissions": [
       {
         "partial": "intro_tables/windows_permissions.html"
       }
     ]
   }
 }