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

webrtc/base/base.gyp

Index: webrtc/base/base.gyp
diff --git a/webrtc/base/base.gyp b/webrtc/base/base.gyp
index d0a457bd1f1631ec1105da1687647321057e170a..a6b2b1cd4aec4cc348dc47363c7f6e432b13f479 100644
--- a/webrtc/base/base.gyp
+++ b/webrtc/base/base.gyp
@@ -115,6 +115,8 @@
         'ratetracker.cc',
         'ratetracker.h',
         'refcount.h',
+        'safe_conversions.h',
+        'safe_conversions_impl.h',
         'scoped_ptr.h',
         'scoped_ref_ptr.h',
         'stringencode.cc',
@@ -157,7 +159,6 @@
       'dependencies': [
         '<(webrtc_root)/common.gyp:webrtc_common',
         'rtc_base_approved',
-        'safe_numerics',
       ],
       'export_dependent_settings': [
         'rtc_base_approved',
@@ -498,6 +499,8 @@
             'proxyserver.h',
             'referencecountedsingletonfactory.h',
             'rollingaccumulator.h',
+            'safe_conversions.h',
+            'safe_conversions_impl.h',
             'scopedptrcollection.h',
             'sec_buffer.h',
             'sslconfig.h',
@@ -748,19 +751,5 @@
         'gtest_prod_util.h',
       ],
     },
-    {
-      # GN version: webrtc/base:safe_numerics
-      'target_name': 'safe_numerics',
-      'type': 'static_library',
-      'dependencies': [
-        'rtc_base_approved',
-      ],
-      'sources': [
-        'numerics/safe_conversions.h',
-        'numerics/safe_conversions_impl.h',
-        'numerics/safe_math.h',
-        'numerics/safe_math_impl.h',
-      ],
-    },
   ],
 }