Move MediaGalleries.getMediaFileSystems back to experimental for M22

chrome/common/extensions/docs/samples.json

 {
   "api": {
     "chrome.alarms.clear": "alarms.html#method-clear",
     "chrome.alarms.clearAll": "alarms.html#method-clearAll",
     "chrome.alarms.create": "alarms.html#method-create",
     "chrome.alarms.get": "alarms.html#method-get",
     "chrome.alarms.getAll": "alarms.html#method-getAll",
     "chrome.alarms.onAlarm": "alarms.html#event-onAlarm",
     "chrome.app.window.create": "app.window.html#method-create",
     "chrome.app.window.focus": "app.window.html#method-focus",
@@ skipping 139 matching lines @@
     "chrome.experimental.devtools.console.getMessages": "experimental.devtools.console.html#method-getMessages",
     "chrome.experimental.devtools.console.onMessageAdded": "experimental.devtools.console.html#event-onMessageAdded",
     "chrome.experimental.discovery.clearAllSuggestions": "experimental.discovery.html#method-clearAllSuggestions",
     "chrome.experimental.discovery.removeSuggestion": "experimental.discovery.html#method-removeSuggestion",
     "chrome.experimental.discovery.suggest": "experimental.discovery.html#method-suggest",
     "chrome.experimental.identity.getAuthToken": "experimental.identity.html#method-getAuthToken",
     "chrome.experimental.identity.launchWebAuthFlow": "experimental.identity.html#method-launchWebAuthFlow",
     "chrome.experimental.infobars.show": "experimental.infobars.html#method-show",
     "chrome.experimental.mediaGalleries.assembleMediaFile": "experimental.mediaGalleries.html#method-assembleMediaFile",
     "chrome.experimental.mediaGalleries.extractEmbeddedThumbnails": "experimental.mediaGalleries.html#method-extractEmbeddedThumbnails",
+    "chrome.experimental.mediaGalleries.getMediaFileSystems": "experimental.mediaGalleries.html#method-getMediaFileSystems",
     "chrome.experimental.offscreenTabs.create": "experimental.offscreenTabs.html#method-create",
     "chrome.experimental.offscreenTabs.get": "experimental.offscreenTabs.html#method-get",
     "chrome.experimental.offscreenTabs.getAll": "experimental.offscreenTabs.html#method-getAll",
     "chrome.experimental.offscreenTabs.onUpdated": "experimental.offscreenTabs.html#event-onUpdated",
     "chrome.experimental.offscreenTabs.remove": "experimental.offscreenTabs.html#method-remove",
     "chrome.experimental.offscreenTabs.sendKeyboardEvent": "experimental.offscreenTabs.html#method-sendKeyboardEvent",
     "chrome.experimental.offscreenTabs.sendMouseEvent": "experimental.offscreenTabs.html#method-sendMouseEvent",
     "chrome.experimental.offscreenTabs.toDataUrl": "experimental.offscreenTabs.html#method-toDataUrl",
     "chrome.experimental.offscreenTabs.update": "experimental.offscreenTabs.html#method-update",
     "chrome.experimental.processes.getProcessIdForTab": "experimental.processes.html#method-getProcessIdForTab",
@@ skipping 95 matching lines @@
     "chrome.management.getAll": "management.html#method-getAll",
     "chrome.management.getPermissionWarningsById": "management.html#method-getPermissionWarningsById",
     "chrome.management.getPermissionWarningsByManifest": "management.html#method-getPermissionWarningsByManifest",
     "chrome.management.launchApp": "management.html#method-launchApp",
     "chrome.management.onDisabled": "management.html#event-onDisabled",
     "chrome.management.onEnabled": "management.html#event-onEnabled",
     "chrome.management.onInstalled": "management.html#event-onInstalled",
     "chrome.management.onUninstalled": "management.html#event-onUninstalled",
     "chrome.management.setEnabled": "management.html#method-setEnabled",
     "chrome.management.uninstall": "management.html#method-uninstall",
-    "chrome.mediaGalleries.getMediaFileSystems": "mediaGalleries.html#method-getMediaFileSystems",
     "chrome.omnibox.onInputCancelled": "omnibox.html#event-onInputCancelled",
     "chrome.omnibox.onInputChanged": "omnibox.html#event-onInputChanged",
     "chrome.omnibox.onInputEntered": "omnibox.html#event-onInputEntered",
     "chrome.omnibox.onInputStarted": "omnibox.html#event-onInputStarted",
     "chrome.omnibox.setDefaultSuggestion": "omnibox.html#method-setDefaultSuggestion",
     "chrome.pageAction.getPopup": "pageAction.html#method-getPopup",
     "chrome.pageAction.getTitle": "pageAction.html#method-getTitle",
     "chrome.pageAction.hide": "pageAction.html#method-hide",
     "chrome.pageAction.onClicked": "pageAction.html#event-onClicked",
     "chrome.pageAction.setIcon": "pageAction.html#method-setIcon",
@@ skipping 2527 matching lines @@
         "manifest.json",
         "popup.html",
         "popup.js",
         "sample.css"
       ],
       "source_hash": "8e51dc3a9577065d22ce92f3c838edc5ceaf4e65",
       "zip_path": "examples/api/extension/isAllowedAccess.zip"
     }
   ]
 }