GitLab

Allow optional remote callback, then perform synchronous completion
if receiving data is enough small for SRPC buffer. Otherwise invoke
another callback for asynchronous completion from main thread.

BUG=87310
TEST=browser_tests --gtest_filter=PPAPINaclTest.WebSocket_StressedSendReceive

Review URL: https://chromiumcodereview.appspot.com/9802027

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@132413 0039d316-1c4b-4281-b951-d872f2087c98