Safe numeric library: base/numerics (copied from Chromium)

webrtc/base/BUILD.gn

Index: webrtc/base/BUILD.gn
diff --git a/webrtc/base/BUILD.gn b/webrtc/base/BUILD.gn
index a056269c95fc88212d2aca18c8256477321d48fc..2968dcc58ac0ff094f38c387269012b92d97218f 100644
--- a/webrtc/base/BUILD.gn
+++ b/webrtc/base/BUILD.gn
@@ -98,10 +98,13 @@ if (rtc_build_ssl == 0) {
 
 # The subset of rtc_base approved for use outside of libjingle.
 static_library("rtc_base_approved") {
-  deps = []
   configs += [ "..:common_config" ]
   public_configs = [ "..:common_inherited_config" ]
 
+  deps = [
+    "numerics:safe_numerics",
+  ]
+
   sources = [
     "array_view.h",
     "atomicops.h",
@@ -141,8 +144,6 @@ static_library("rtc_base_approved") {
     "rate_statistics.cc",
     "rate_statistics.h",
     "refcount.h",
-    "safe_conversions.h",
-    "safe_conversions_impl.h",
     "scoped_ptr.h",
     "scoped_ref_ptr.h",
     "stringencode.cc",