Consolidate base:: imports.

This merges the mrucache and numerics into one folder, to prevent
having to make two identical versions of logging.

BUG=angleproject:2044

Change-Id: Iba6dab05b21eb9ba0de44f27a90579c590a9a7fd
Reviewed-on: https://chromium-review.googlesource.com/522870
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
diff --git a/src/libANGLE/validationES3.cpp b/src/libANGLE/validationES3.cpp
index 501c462..18b554e 100644
--- a/src/libANGLE/validationES3.cpp
+++ b/src/libANGLE/validationES3.cpp
@@ -8,7 +8,7 @@
 
 #include "libANGLE/validationES3.h"
 
-#include "base/numerics/safe_conversions.h"
+#include "anglebase/numerics/safe_conversions.h"
 #include "common/mathutil.h"
 #include "common/utilities.h"
 #include "libANGLE/Context.h"