Remove a pointless anonymous namespace in a header.

Review URL: https://codereview.appspot.com/6827047

git-svn-id: http://skia.googlecode.com/svn/trunk@6304 2bbb7eff-a529-9590-31e7-b0007b416f81

include/core/SkTypes.h

@@ -112,14 +112,10 @@ inline void operator delete(void* p) {
     #define SkAssertResult(cond)        cond
 #endif
 
-namespace {
-
 template <bool>
 struct SkCompileAssert {
 };
 
-}  // namespace
-
 #define SK_COMPILE_ASSERT(expr, msg) \
     typedef SkCompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]