Update the tcmalloc chromium branch to r144 (gperftools 2.0), and merge chromium-specific changes.

third_party/tcmalloc/chromium/src/windows/gperftools/tcmalloc.h.in

Index: third_party/tcmalloc/chromium/src/windows/gperftools/tcmalloc.h.in
diff --git a/third_party/tcmalloc/chromium/src/windows/google/tcmalloc.h.in b/third_party/tcmalloc/chromium/src/windows/gperftools/tcmalloc.h.in
similarity index 94%
rename from third_party/tcmalloc/chromium/src/windows/google/tcmalloc.h.in
rename to third_party/tcmalloc/chromium/src/windows/gperftools/tcmalloc.h.in
index a031b35d7c70c689be926fcefe0db91f4aad0a52..d09ec953622e0a9eb8e7c6cec2bd471bef97ea0c 100644
--- a/third_party/tcmalloc/chromium/src/windows/google/tcmalloc.h.in
+++ b/third_party/tcmalloc/chromium/src/windows/gperftools/tcmalloc.h.in
@@ -35,6 +35,11 @@
 #ifndef TCMALLOC_TCMALLOC_H_
 #define TCMALLOC_TCMALLOC_H_
 
+#include <stddef.h>                     // for size_t
+#ifdef HAVE_SYS_CDEFS_H
+#include <sys/cdefs.h>   // where glibc defines __THROW
+#endif
+
 // __THROW is defined in glibc systems.  It means, counter-intuitively,
 // "This function will never throw an exception."  It's an optional
 // optimization tool, but we may need to use it to match glibc prototypes.
@@ -46,7 +51,7 @@
 #define TC_VERSION_MAJOR  @TC_VERSION_MAJOR@
 #define TC_VERSION_MINOR  @TC_VERSION_MINOR@
 #define TC_VERSION_PATCH  "@TC_VERSION_PATCH@"
-#define TC_VERSION_STRING "google-perftools @TC_VERSION_MAJOR@.@TC_VERSION_MINOR@@TC_VERSION_PATCH@"
+#define TC_VERSION_STRING "gperftools @TC_VERSION_MAJOR@.@TC_VERSION_MINOR@@TC_VERSION_PATCH@"
 
 #include <stdlib.h>   // for struct mallinfo, if it's defined
 
@@ -60,7 +65,9 @@
 #endif
 
 #ifdef __cplusplus
-#include <new>          // for std::nothrow_t
+namespace std {
+struct nothrow_t;
+}
 
 extern "C" {
 #endif