Clean kForever from basictypes and move it to the interfaces that actually have it.

R=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/33269004

Cr-Commit-Position: refs/heads/master@{#8296}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8296 4adac7df-926f-26a2-2b94-8c16560cd09d

talk/media/sctp/sctpdataengine_unittest.cc

@@ -318,7 +318,7 @@ class SctpDataMediaChannelTest : public testing::Test,
     rtc::Thread* thread = rtc::Thread::Current();
     while (!thread->empty()) {
       rtc::Message msg;
-      if (thread->Get(&msg, rtc::kForever)) {
+      if (thread->Get(&msg, rtc::Thread::kForever)) {
         thread->Dispatch(&msg);
       }
     }