Add newlines to the end of files where they were missing

ppapi/tests/test_trace_event.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ppapi/tests/test_trace_event.h"
 
 #include "ppapi/cpp/module.h"
 #include "ppapi/tests/testing_instance.h"
 
 REGISTER_TEST_CASE(TraceEvent);
@@ skipping 44 matching lines @@
 std::string TestTraceEvent::TestClock() {
   int64_t last = interface_->Now();
 
   for(int i=0; i<5; ++i){
     int64_t next = interface_->Now();
     ASSERT_LE(last, next);
     last = next;
   }
 
   PASS();
-}
+}