Enable -Wdeprecated-register (except on CrOS and 32-bit Linux).

third_party/WebKit/Source/platform/ColorData.gperf

 %{
 #include "platform/graphics/Color.h"
 #include <string.h>
 
 namespace blink {
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+// TODO(thakis): Remove once we use a gperf that no longer produces "register".
+#pragma clang diagnostic ignored "-Wdeprecated-register"
+#endif
+
 %}
 %struct-type
 struct NamedColor;
 %omit-struct-type
 %language=C++
 %readonly-tables
 %global-table
 %compare-strncmp
 %define class-name ColorDataHash
 %define lookup-function-name findColorImpl
@@ skipping 145 matching lines @@
 transparent, 0x00000000
 turquoise, 0xff40e0d0
 violet, 0xffee82ee
 violetred, 0xffd02090
 wheat, 0xfff5deb3
 white, 0xffffffff
 whitesmoke, 0xfff5f5f5
 yellow, 0xffffff00
 yellowgreen, 0xff9acd32
 %%
-const struct NamedColor* findColor(register const char* str, register unsigned len)
-{
-    return ColorDataHash::findColorImpl(str, len);
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+
+const struct NamedColor* findColor(const char* str, unsigned len) {
+  return ColorDataHash::findColorImpl(str, len);
 }
 
 } // namespace blink