1. Enable large object pointer offset check in release build.

third_party/tcmalloc/chromium/src/internal_logging.h

Index: third_party/tcmalloc/chromium/src/internal_logging.h
===================================================================
--- third_party/tcmalloc/chromium/src/internal_logging.h	(revision 137587)
+++ third_party/tcmalloc/chromium/src/internal_logging.h	(working copy)
@@ -113,12 +113,21 @@
   }                                                                      \
 } while (0)
 
+#define CHECK_CONDITION_PRINT(cond, str)                                 \
+do {                                                                     \
+  if (!(cond)) {                                                         \

[gpike, 2012/05/23 00:22:50]

Do we have UNLIKELY or EXPECT_FALSE or whatnot defined in config.h?  This is a
good place for "if (UNLIKELY(...)) ..." (Same comment applies to
CHECK_CONDITION.)

+    ::tcmalloc::Log(::tcmalloc::kCrash, __FILE__, __LINE__, str);        \
+  }                                                                      \
+} while (0)
+
 // Our own version of assert() so we can avoid hanging by trying to do
 // all kinds of goofy printing while holding the malloc lock.
 #ifndef NDEBUG
 #define ASSERT(cond) CHECK_CONDITION(cond)
+#define ASSERT_PRINT(cond, str) CHECK_CONDITION_PRINT(cond, str)
 #else
 #define ASSERT(cond) ((void) 0)
+#define ASSERT_PRINT(cond, str) ((void) 0)
 #endif
 
 // Print into buffer