Remove COMPILE_ASSERT.

base/macros.h

Index: base/macros.h
diff --git a/base/macros.h b/base/macros.h
index 65c7749367fc91a39fd7fae9393e99677abbda95..4adbbb075509d037934fa5e9f24eafe2c05b3ea1 100644
--- a/base/macros.h
+++ b/base/macros.h
@@ -55,24 +55,6 @@
 template <typename T, size_t N> char (&ArraySizeHelper(T (&array)[N]))[N];
 #define arraysize(array) (sizeof(ArraySizeHelper(array)))
 
-// The COMPILE_ASSERT macro can be used to verify that a compile time
-// expression is true. For example, you could use it to verify the
-// size of a static array:
-//
-//   COMPILE_ASSERT(arraysize(content_type_names) == CONTENT_NUM_TYPES,
-//                  content_type_names_incorrect_size);
-//
-// or to make sure a struct is smaller than a certain size:
-//
-//   COMPILE_ASSERT(sizeof(foo) < 128, foo_too_large);
-//
-// The second argument to the macro is the name of the variable. If
-// the expression is false, most compilers will issue a warning/error
-// containing the name of the variable.
-
-#undef COMPILE_ASSERT
-#define COMPILE_ASSERT(expr, msg) static_assert(expr, #msg)
-
 // bit_cast<Dest,Source> is a template function that implements the
 // equivalent of "*reinterpret_cast<Dest*>(&source)".  We need this in
 // very low-level functions like the protobuf library and fast math