Update yasm to the same version currently used by Chromium.

third_party/yasm/BUILD.gn

Index: third_party/yasm/BUILD.gn
diff --git a/third_party/yasm/BUILD.gn b/third_party/yasm/BUILD.gn
index 9ed8e46d68ac25db90008e716bc9efb1a24039b2..f13799bef5e231fdfb46fabdd7dcafcdcd4b891d 100644
--- a/third_party/yasm/BUILD.gn
+++ b/third_party/yasm/BUILD.gn
@@ -55,6 +55,9 @@ if (current_toolchain == host_toolchain) {
       ":yasm_config",
       "//build/config/compiler:no_chromium_code",
     ]
+    deps = [
+      "//build/config/sanitizers:deps",
+    ]
   }
 
   executable("genmodule") {
@@ -66,6 +69,9 @@ if (current_toolchain == host_toolchain) {
       ":yasm_config",
       "//build/config/compiler:no_chromium_code",
     ]
+    deps = [
+      "//build/config/sanitizers:deps",
+    ]
   }
 
   executable("genperf") {
@@ -82,6 +88,7 @@ if (current_toolchain == host_toolchain) {
 
     deps = [
       ":yasm_utils",
+      "//build/config/sanitizers:deps",
     ]
   }
 
@@ -109,6 +116,9 @@ if (current_toolchain == host_toolchain) {
       ":yasm_config",
       "//build/config/compiler:no_chromium_code",
     ]
+    deps = [
+      "//build/config/sanitizers:deps",
+    ]
   }
 
   executable("genversion") {
@@ -120,6 +130,23 @@ if (current_toolchain == host_toolchain) {
       ":yasm_config",
       "//build/config/compiler:no_chromium_code",
     ]
+    deps = [
+      "//build/config/sanitizers:deps",
+    ]
+  }
+
+  config("re2c_warnings") {
+    # re2c is missing CLOSEVOP from one switch.
+    if (is_clang) {
+      cflags = [
+        # re2c is missing CLOSEVOP from one switch.
+        "-Wno-switch",
+
+        # re2c contains many static functions in headers (because it's
+        # a C library predating C99.)
+        "-Wno-unused-function",
+      ]
+    }
   }
 
   executable("re2c") {
@@ -139,11 +166,22 @@ if (current_toolchain == host_toolchain) {
     configs += [
       ":yasm_config",
       "//build/config/compiler:no_chromium_code",
+
+      # Must be after no_chromium_code for warning flags to be ordered
+      # correctly.
+      ":re2c_warnings",
+    ]
+    deps = [
+      "//build/config/sanitizers:deps",
     ]
+  }
 
-    # re2c is missing CLOSEVOP from one switch.
-    if (is_posix) {
-      cflags = [ "-Wno-switch" ]
+  config("yasm_warnings") {
+    if (is_clang) {
+      cflags = [
+        # reg3264type in x86expr.c is unused.
+        "-Wno-unused-local-typedef",
+      ]
     }
   }
 
@@ -234,6 +272,11 @@ if (current_toolchain == host_toolchain) {
     configs += [
       ":yasm_config",
       "//build/config/compiler:no_chromium_code",
+      "//build/config/compiler:no_incompatible_pointer_warnings",
+
+      # Must be after no_chromium_code for warning flags to be ordered
+      # correctly.
+      ":yasm_warnings",
     ]
 
     # Yasm generates a bunch of .c files which its source file #include.
@@ -244,12 +287,9 @@ if (current_toolchain == host_toolchain) {
 
     if (!is_win) {
       cflags = [
-        "-ansi",
+        "-std=c89",
         "-pedantic",
       ]
-      if (is_clang) {
-        cflags += [ "-Wno-incompatible-pointer-types" ]
-      }
     }
 
     # TODO(ajwong): This should take most of the generated output as
@@ -259,14 +299,15 @@ if (current_toolchain == host_toolchain) {
       ":compile_gperf_for_include",
       ":compile_nasm_macros",
       ":compile_nasm_version",
+      ":compile_re2c",
       ":compile_re2c_lc3b",
       ":compile_win64_gas",
       ":compile_win64_nasm",
-      ":compile_re2c",
       ":generate_license",
       ":generate_module",
       ":generate_version",
       ":yasm_utils",
+      "//build/config/sanitizers:deps",
     ]
   }