tcmalloc: Let DEFINE_string define char arrays.

third_party/tcmalloc/chromium/src/base/commandlineflags.h

Index: third_party/tcmalloc/chromium/src/base/commandlineflags.h
diff --git a/third_party/tcmalloc/chromium/src/base/commandlineflags.h b/third_party/tcmalloc/chromium/src/base/commandlineflags.h
index 6d41e8643659c560d4e9425f6da67bb556a0c403..614be3a1a6bca90ebd621793f0c8c4033a5f7727 100644
--- a/third_party/tcmalloc/chromium/src/base/commandlineflags.h
+++ b/third_party/tcmalloc/chromium/src/base/commandlineflags.h
@@ -59,13 +59,13 @@
 #endif
 
 #define DECLARE_VARIABLE(type, name)                                          \
-  namespace FLAG__namespace_do_not_use_directly_use_DECLARE_##type##_instead {  \
+  namespace FLAG__namespace_do_not_use_directly_use_DECLARE_##type##_instead {\
   extern PERFTOOLS_DLL_DECL type FLAGS_##name;                                \
   }                                                                           \
   using FLAG__namespace_do_not_use_directly_use_DECLARE_##type##_instead::FLAGS_##name
 
 #define DEFINE_VARIABLE(type, name, value, meaning) \
-  namespace FLAG__namespace_do_not_use_directly_use_DECLARE_##type##_instead {  \
+  namespace FLAG__namespace_do_not_use_directly_use_DECLARE_##type##_instead {\
   PERFTOOLS_DLL_DECL type FLAGS_##name(value);                                \
   char FLAGS_no##name;                                                        \
   }                                                                           \
@@ -100,16 +100,15 @@
 #define DEFINE_double(name, value, meaning) \
   DEFINE_VARIABLE(double, name, value, meaning)
 
-// Special case for string, because we have to specify the namespace
-// std::string, which doesn't play nicely with our FLAG__namespace hackery.
+// Special case for string, because of the pointer type.
 #define DECLARE_string(name)                                          \
   namespace FLAG__namespace_do_not_use_directly_use_DECLARE_string_instead {  \
-  extern std::string FLAGS_##name;                                                   \
+  extern const char* FLAGS_##name;                                            \
   }                                                                           \
   using FLAG__namespace_do_not_use_directly_use_DECLARE_string_instead::FLAGS_##name
 #define DEFINE_string(name, value, meaning) \
   namespace FLAG__namespace_do_not_use_directly_use_DECLARE_string_instead {  \
-  std::string FLAGS_##name(value);                                                   \
+  const char* FLAGS_##name = value;                                           \
   char FLAGS_no##name;                                                        \
   }                                                                           \
   using FLAG__namespace_do_not_use_directly_use_DECLARE_string_instead::FLAGS_##name