Don't define USE_HEAPCHECKER on Windows.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/3815007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@62780 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/build_config.h b/build/build_config.h
index c0a7bee..a3ddc2b3 100644
--- a/build/build_config.h
+++ b/build/build_config.h
@@ -66,7 +66,7 @@
 #endif
 
 // Use heapchecker.
-#if (defined(OS_WIN) || defined(OS_LINUX)) && !defined(NO_HEAPCHECKER)
+#if defined(OS_LINUX) && !defined(NO_HEAPCHECKER)
 #define USE_HEAPCHECKER 1
 #endif