Deprecate chrome.extension.sendRequest in favor of sendMessage, with a safer

chrome/common/extensions/docs/samples.json

 {
   "api": {
     "chrome.bookmarks.create": "bookmarks.html#method-create",
     "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.move": "bookmarks.html#method-move",
     "chrome.bookmarks.onChanged": "bookmarks.html#event-onChanged",
@@ skipping 128 matching lines @@
     "chrome.experimental.speechInput.stop": "experimental.speechInput.html#method-stop",
     "chrome.experimental.webRequest.onRequest": "experimental.webRequest.html#event-onRequest",
     "chrome.extension.connect": "extension.html#method-connect",
     "chrome.extension.getBackgroundPage": "extension.html#method-getBackgroundPage",
     "chrome.extension.getURL": "extension.html#method-getURL",
     "chrome.extension.getViews": "extension.html#method-getViews",
     "chrome.extension.isAllowedFileSchemeAccess": "extension.html#method-isAllowedFileSchemeAccess",
     "chrome.extension.isAllowedIncognitoAccess": "extension.html#method-isAllowedIncognitoAccess",
     "chrome.extension.onConnect": "extension.html#event-onConnect",
     "chrome.extension.onConnectExternal": "extension.html#event-onConnectExternal",
+    "chrome.extension.onMessage": "extension.html#event-onMessage",
+    "chrome.extension.onMessageExternal": "extension.html#event-onMessageExternal",
     "chrome.extension.onRequest": "extension.html#event-onRequest",
     "chrome.extension.onRequestExternal": "extension.html#event-onRequestExternal",
+    "chrome.extension.sendMessage": "extension.html#method-sendMessage",
     "chrome.extension.sendRequest": "extension.html#method-sendRequest",
     "chrome.extension.setUpdateUrlData": "extension.html#method-setUpdateUrlData",
     "chrome.fileBrowserHandler.onExecute": "fileBrowserHandler.html#event-onExecute",
     "chrome.history.addUrl": "history.html#method-addUrl",
     "chrome.history.deleteAll": "history.html#method-deleteAll",
     "chrome.history.deleteRange": "history.html#method-deleteRange",
     "chrome.history.deleteUrl": "history.html#method-deleteUrl",
     "chrome.history.getVisits": "history.html#method-getVisits",
     "chrome.history.onVisitRemoved": "history.html#event-onVisitRemoved",
     "chrome.history.onVisited": "history.html#event-onVisited",
@@ skipping 70 matching lines @@
     "chrome.tabs.onAttached": "tabs.html#event-onAttached",
     "chrome.tabs.onCreated": "tabs.html#event-onCreated",
     "chrome.tabs.onDetached": "tabs.html#event-onDetached",
     "chrome.tabs.onHighlighted": "tabs.html#event-onHighlighted",
     "chrome.tabs.onMoved": "tabs.html#event-onMoved",
     "chrome.tabs.onRemoved": "tabs.html#event-onRemoved",
     "chrome.tabs.onUpdated": "tabs.html#event-onUpdated",
     "chrome.tabs.query": "tabs.html#method-query",
     "chrome.tabs.reload": "tabs.html#method-reload",
     "chrome.tabs.remove": "tabs.html#method-remove",
+    "chrome.tabs.sendMessage": "tabs.html#method-sendMessage",
     "chrome.tabs.sendRequest": "tabs.html#method-sendRequest",
     "chrome.tabs.update": "tabs.html#method-update",
     "chrome.topSites.get": "topSites.html#method-get",
     "chrome.tts.getVoices": "tts.html#method-getVoices",
     "chrome.tts.isSpeaking": "tts.html#method-isSpeaking",
     "chrome.tts.speak": "tts.html#method-speak",
     "chrome.tts.stop": "tts.html#method-stop",
     "chrome.ttsEngine.onSpeak": "ttsEngine.html#event-onSpeak",
     "chrome.ttsEngine.onStop": "ttsEngine.html#event-onStop",
     "chrome.types.ChromeSetting.clear": "types.html#method-ChromeSetting-clear",
@@ skipping 2331 matching lines @@
         "manifest.json",
         "popup.html",
         "popup.js",
         "sample.css"
       ],
       "source_hash": "8e51dc3a9577065d22ce92f3c838edc5ceaf4e65",
       "zip_path": "examples\/api\/extension\/isAllowedAccess.zip"
     }
   ]
 }