Use std:: on symbols declared in C++-style C headers.

test/cctest/test-log.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 185 matching lines @@
       : LoopingThread(isolate) { }
   void RunLoop() {
     v8::Locker locker;
     v8::Unlocker unlocker;
     // Now thread has V8's id, but will not run VM code.
     CHECK(CcTest::i_isolate() != NULL);
     CHECK_GT(CcTest::i_isolate()->thread_manager()->CurrentId(), 0);
     double i = 10;
     SignalRunning();
     while (IsRunning()) {
-      i = sin(i);
+      i = std::sin(i);
       i::OS::Sleep(1);
     }
   }
 };
 
 
 class TestSampler : public v8::internal::Sampler {
  public:
   explicit TestSampler(v8::internal::Isolate* isolate)
       : Sampler(isolate, 0, true, true),
@@ skipping 266 matching lines @@
     v8::Local<v8::String> s = result->ToString();
     i::ScopedVector<char> data(s->Utf8Length() + 1);
     CHECK_NE(NULL, data.start());
     s->WriteUtf8(data.start());
     printf("%s\n", data.start());
     // Make sure that our output is written prior crash due to CHECK failure.
     fflush(stdout);
     CHECK(false);
   }
 }