Re-land alexbost's experimental Offscreen Tabs API work.

chrome/common/extensions/docs/samples.json

Index: chrome/common/extensions/docs/samples.json
diff --git a/chrome/common/extensions/docs/samples.json b/chrome/common/extensions/docs/samples.json
index 9cd4861a09081d60a1514122a80f0ecca2efbdc7..eb8e937808ecdf0de1381a34df6b10449505ec58 100644
--- a/chrome/common/extensions/docs/samples.json
+++ b/chrome/common/extensions/docs/samples.json
@@ -73,6 +73,15 @@
     "chrome.experimental.devtools.console.getMessages": "experimental.devtools.console.html#method-getMessages",
     "chrome.experimental.devtools.console.onMessageAdded": "experimental.devtools.console.html#event-onMessageAdded",
     "chrome.experimental.infobars.show": "experimental.infobars.html#method-show",
+    "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.speechInput.isRecording": "experimental.speechInput.html#method-isRecording",
     "chrome.experimental.speechInput.onError": "experimental.speechInput.html#event-onError",
     "chrome.experimental.speechInput.onResult": "experimental.speechInput.html#event-onResult",
@@ -2465,4 +2474,4 @@
       "zip_path": "examples\/api\/extension\/isAllowedAccess.zip"
     }
   ]
-}
+}