Use conservative text blob bounds.

Speculative fix for http://crbug.com/451401.

BUG=451401
R=reed@google.com,jbroman@chromium.org

Review URL: https://codereview.chromium.org/881343004

Cr-Commit-Position: refs/heads/master@{#313653}

skia/config/SkUserConfig.h

@@ -270,10 +270,6 @@ SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 #    define SK_DYNAMIC_ANNOTATIONS_ENABLED 1
 #endif
 
-#ifndef SK_SUPPORT_LEGACY_BLOB_BOUNDS
-#   define SK_SUPPORT_LEGACY_BLOB_BOUNDS
-#endif
-
 // ===== End Chrome-specific definitions =====
 
 #endif