Revert 260399 "Temporary CHECK version 2 in IPC::Channel::Send()..."

> Temporary CHECK version 2 in IPC::Channel::Send() to help track down crash.
> 
> TBR=sievers@chromium.org, cpu@chromium.org
> BUG=357915
> 
> Review URL: https://codereview.chromium.org/218433002

TBR=viettrungluu@chromium.org

Review URL: https://codereview.chromium.org/216933007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@260419 0039d316-1c4b-4281-b951-d872f2087c98

ipc/ipc_channel_posix.cc

@@ -527,8 +527,6 @@ bool Channel::ChannelImpl::ProcessOutgoingMessages() {
 }
 
 bool Channel::ChannelImpl::Send(Message* message) {
-  // TODO(vtl): Remove once bug resolved.
-  CHECK(message && message->data()) << "crbug.com/357915";
   DVLOG(2) << "sending message @" << message << " on channel @" << this
            << " with type " << message->type()
            << " (" << output_queue_.size() << " in queue)";

ipc/ipc_channel_win.cc

@@ -81,8 +81,6 @@ void Channel::ChannelImpl::Close() {
 }
 
 bool Channel::ChannelImpl::Send(Message* message) {
-  // TODO(vtl): Remove once bug resolved.
-  CHECK(message && message->data()) << "crbug.com/357915";
   DCHECK(thread_check_->CalledOnValidThread());
   DVLOG(2) << "sending message @" << message << " on channel @" << this
            << " with type " << message->type()