Include only stuff you need, part 6: Fix cctest.h.

test/cctest/test-date.cc

Index: test/cctest/test-date.cc
diff --git a/test/cctest/test-date.cc b/test/cctest/test-date.cc
index a745949fbdbc544bed26a85c16faf320012c12c2..aa9f9f7ca1936a740f1e96c1e853b0ed6b0877aa 100644
--- a/test/cctest/test-date.cc
+++ b/test/cctest/test-date.cc
@@ -25,9 +25,10 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#include "src/v8.h"
-
+#include "src/date.h"
 #include "src/global-handles.h"
+#include "src/isolate.h"
+#include "src/v8.h"
 #include "test/cctest/cctest.h"
 
 using namespace v8::internal;