Remove unneeded uses of logging.h in header files.
Review URL: http://codereview.chromium.org/43148

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@11590 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/base/timer.h b/base/timer.h
index 08c851ffd..887c2c3f 100644
--- a/base/timer.h
+++ b/base/timer.h
@@ -46,6 +46,7 @@
 // because they're flaky on the buildbot, but when you run them locally you
 // should be able to tell the difference.
 
+#include "base/logging.h"
 #include "base/task.h"
 #include "base/time.h"