Adds TCMalloc support for Android.

third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak_bionic.h

Index: third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak_bionic.h
diff --git a/third_party/tcmalloc/vendor/src/libc_override_gcc_and_weak.h b/third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak_bionic.h
similarity index 95%
copy from third_party/tcmalloc/vendor/src/libc_override_gcc_and_weak.h
copy to third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak_bionic.h
index 070ebf72aac92304c195dc08b4c563f42589190e..4aa1dd91a88f8af0d83b7af0ca701632023d67b6 100644
--- a/third_party/tcmalloc/vendor/src/libc_override_gcc_and_weak.h
+++ b/third_party/tcmalloc/chromium/src/libc_override_gcc_and_weak_bionic.h
@@ -53,11 +53,12 @@
 
 #define ALIAS(tc_fn)   __attribute__ ((alias (#tc_fn)))
 
-void* operator new(size_t size) throw (std::bad_alloc)
+// Bionic throws an exception, but there's no std::bad_alloc.
+void* operator new(size_t size) throw (/* std::bad_alloc */)
     ALIAS(tc_new);
 void operator delete(void* p) __THROW
     ALIAS(tc_delete);
-void* operator new[](size_t size) throw (std::bad_alloc)
+void* operator new[](size_t size) throw (/* std::bad_alloc */)
     ALIAS(tc_newarray);
 void operator delete[](void* p) __THROW
     ALIAS(tc_deletearray);