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

third_party/tcmalloc/chromium/src/free_list.cc

Index: third_party/tcmalloc/chromium/src/free_list.cc
diff --git a/third_party/tcmalloc/chromium/src/free_list.cc b/third_party/tcmalloc/chromium/src/free_list.cc
index 842f391c4593071dee2127063fde5a05f78f6913..b4176da83ad4918a8149884a028b641c8c2a2764 100644
--- a/third_party/tcmalloc/chromium/src/free_list.cc
+++ b/third_party/tcmalloc/chromium/src/free_list.cc
@@ -64,16 +64,18 @@
 
 #if defined(TCMALLOC_USE_DOUBLYLINKED_FREELIST)
 
+using tcmalloc::kCrash;
+
 // TODO(jar): We should use C++ rather than a macro here.
 #define MEMORY_CHECK(v1, v2) \
-  if (v1 != v2) CRASH("Memory corruption detected.\n")
+  if (v1 != v2) Log(kCrash, __FILE__, __LINE__, "Memory corruption detected.\n")
 
 namespace {
 void EnsureNonLoop(void* node, void* next) {
   // We only have time to do minimal checking.  We don't traverse the list, but
   // only look for an immediate loop (cycle back to ourself).
   if (node != next) return;
-  CRASH("Circular loop in list detected: %p\n", next);
+  Log(kCrash, __FILE__, __LINE__, "Circular loop in list detected: %p\n", next);
 }
 
 // Returns value of the |previous| pointer w/out running a sanity