Update existing uses of /wd4267 to use the GN config

This is the size_t to integer conversion warning. Using the config prevents flag duplication and is clearer to read.

Minor updates to Win64 build, including some fixes for size_t to int conversions.

Review URL: https://codereview.chromium.org/929793006

Cr-Commit-Position: refs/heads/master@{#317162}

64 files changed, 221 insertions, 322 deletions

diff --git a/apps/BUILD.gn b/apps/BUILD.gn
index 3bffcf5..5c409c2 100644
--- a/apps/BUILD.gn
+++ b/apps/BUILD.gn
@@ -69,8 +69,6 @@ static_library("apps") {
     ]
   }
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
diff --git a/ash/BUILD.gn b/ash/BUILD.gn
index f6f0eb9..ed34a59 100644
--- a/ash/BUILD.gn
+++ b/ash/BUILD.gn
@@ -62,7 +62,7 @@ component("ash") {
     ]
 
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   }
 
   if (use_x11) {
@@ -314,9 +314,7 @@ test("ash_unittests") {
     ]
   }
 
-  if (is_win) {
-    cflags = [ "/wd4267" ]
-  }
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   if (!use_x11) {
     sources -= [ "host/ash_window_tree_host_x11_unittest.cc" ]
diff --git a/base/BUILD.gn b/base/BUILD.gn
index e417681..3c77dad 100644
--- a/base/BUILD.gn
+++ b/base/BUILD.gn
@@ -869,7 +869,7 @@ component("base") {
     ]
 
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
     libs = [
       "cfgmgr32.lib",
@@ -1028,10 +1028,8 @@ component("i18n") {
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
 
 source_set("prefs") {
@@ -1439,10 +1437,8 @@ test("base_unittests") {
     set_sources_assignment_filter(sources_assignment_filter)
   }
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
 
 if (is_android) {
diff --git a/build/secondary/third_party/cacheinvalidation/BUILD.gn b/build/secondary/third_party/cacheinvalidation/BUILD.gn
index 088f89a..feb93d74 100644
--- a/build/secondary/third_party/cacheinvalidation/BUILD.gn
+++ b/build/secondary/third_party/cacheinvalidation/BUILD.gn
@@ -77,17 +77,14 @@ static_library("cacheinvalidation") {
     "src/google/cacheinvalidation/include/types.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   public_configs = [ ":cacheinvalidation_config" ]
 
   deps = [
     "src/google/cacheinvalidation:cacheinvalidation_proto_cpp",
     "//base",
   ]
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
 
 test("cacheinvalidation_unittests") {
diff --git a/build/secondary/third_party/nss/BUILD.gn b/build/secondary/third_party/nss/BUILD.gn
index 768a85d..1786dc1 100644
--- a/build/secondary/third_party/nss/BUILD.gn
+++ b/build/secondary/third_party/nss/BUILD.gn
@@ -217,7 +217,10 @@ if (is_linux) {
         "//build/config/win:lean_and_mean",  # Won"t compile with lean and mean.
       ]
     }
-    configs += [ "//build/config/compiler:no_chromium_code" ]
+    configs += [
+      "//build/config/compiler:no_chromium_code",
+      "//build/config/compiler:no_size_t_to_int_warning",
+    ]
 
     cflags = []
     defines = [
@@ -230,7 +233,6 @@ if (is_linux) {
     if (is_win) {
       cflags = [
         "/wd4554",  # Check precidence.
-        "/wd4267",  # Conversion from size_t to "type".
       ]
       defines += [
         "XP_PC",
@@ -882,7 +884,10 @@ if (is_linux) {
     if (is_win) {
       configs -= [ "//build/config/win:unicode" ]  # Requires 8-bit mode.
     }
-    configs += [ "//build/config/compiler:no_chromium_code" ]
+    configs += [
+      "//build/config/compiler:no_chromium_code",
+      "//build/config/compiler:no_size_t_to_int_warning",
+    ]
     public_configs = [ ":nss_static_config" ]
 
     cflags = []
@@ -903,7 +908,6 @@ if (is_linux) {
     if (is_win) {
       cflags += [
         "/wd4101",  # Unreferenced local variable.
-        "/wd4267",  # Conversion from size_t to "type".
       ]
     }
 
diff --git a/cc/BUILD.gn b/cc/BUILD.gn
index b97bb6c..5fb0909 100644
--- a/cc/BUILD.gn
+++ b/cc/BUILD.gn
@@ -536,10 +536,8 @@ component("cc") {
     "trees/tree_synchronizer.h",
   ]
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]  # size_t -> int
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   public_deps = [
     "//skia",
diff --git a/chrome/browser/devtools/BUILD.gn b/chrome/browser/devtools/BUILD.gn
index e1edca7..a7580cb 100644
--- a/chrome/browser/devtools/BUILD.gn
+++ b/chrome/browser/devtools/BUILD.gn
@@ -47,11 +47,8 @@ static_library("devtools") {
   ]
   sources += get_target_outputs(":devtools_protocol_constants")
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
   configs += [
+    "//build/config/compiler:no_size_t_to_int_warning",
     "//build/config/compiler:wexit_time_destructors",
     "//third_party/WebKit/public:debug_devtools",
   ]
diff --git a/chrome/common/net/BUILD.gn b/chrome/common/net/BUILD.gn
index 0794d86..b69512c 100644
--- a/chrome/common/net/BUILD.gn
+++ b/chrome/common/net/BUILD.gn
@@ -57,7 +57,5 @@ static_library("net") {
     deps += [ "//third_party/boringssl" ]
   }
 
-  if (is_win) {
-    cflags = [ "/wd4267" ]
-  }
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
diff --git a/chrome/installer/util/BUILD.gn b/chrome/installer/util/BUILD.gn
index a73f920..8dca7ce 100644
--- a/chrome/installer/util/BUILD.gn
+++ b/chrome/installer/util/BUILD.gn
@@ -66,7 +66,7 @@ static_library("util") {
     include_dirs = [ "$root_gen_dir/installer_util_strings" ]
 
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
     # TODO(GYP) hook up corresponding version of installer_util_nacl_win64 in GN
     sources += [
diff --git a/components/autofill/content/renderer/BUILD.gn b/components/autofill/content/renderer/BUILD.gn
index 89706ab..bd0c7b2 100644
--- a/components/autofill/content/renderer/BUILD.gn
+++ b/components/autofill/content/renderer/BUILD.gn
@@ -38,8 +38,6 @@ static_library("renderer") {
     "//ui/base",
   ]
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
diff --git a/components/autofill/core/browser/BUILD.gn b/components/autofill/core/browser/BUILD.gn
index dd040a0..5c937b0 100644
--- a/components/autofill/core/browser/BUILD.gn
+++ b/components/autofill/core/browser/BUILD.gn
@@ -175,6 +175,7 @@ static_library("browser") {
     "//url",
   ]
 
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   public_configs = [ ":autofill_browser_config" ]
 
   if (autofill_enable_sync) {
@@ -189,11 +190,6 @@ static_library("browser") {
       "webdata/autofill_wallet_syncable_service.h",
     ]
   }
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
 
 static_library("test_support") {
diff --git a/components/keyed_service/content/BUILD.gn b/components/keyed_service/content/BUILD.gn
index b75f864..6d3d5b6 100644
--- a/components/keyed_service/content/BUILD.gn
+++ b/components/keyed_service/content/BUILD.gn
@@ -19,11 +19,10 @@ component("content") {
     "refcounted_browser_context_keyed_service_factory.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "KEYED_SERVICE_IMPLEMENTATION" ]
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 
   deps = [
     "//base",
diff --git a/components/keyed_service/core/BUILD.gn b/components/keyed_service/core/BUILD.gn
index 2d8670e..8585cbb 100644
--- a/components/keyed_service/core/BUILD.gn
+++ b/components/keyed_service/core/BUILD.gn
@@ -26,14 +26,11 @@ component("core") {
     "service_access_types.h",
   ]
 
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "KEYED_SERVICE_IMPLEMENTATION" ]
 
   deps = [
     "//base",
   ]
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
diff --git a/components/packed_ct_ev_whitelist/BUILD.gn b/components/packed_ct_ev_whitelist/BUILD.gn
index ae9561e..c3ca36c 100644
--- a/components/packed_ct_ev_whitelist/BUILD.gn
+++ b/components/packed_ct_ev_whitelist/BUILD.gn
@@ -10,16 +10,13 @@ static_library("packed_ct_ev_whitelist") {
     "packed_ct_ev_whitelist.h",
   ]
 
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     "//base",
     "//content",
     "//net",
   ]
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
 
 source_set("unit_tests") {
diff --git a/components/password_manager/core/browser/BUILD.gn b/components/password_manager/core/browser/BUILD.gn
index d6601bf..3d06f74 100644
--- a/components/password_manager/core/browser/BUILD.gn
+++ b/components/password_manager/core/browser/BUILD.gn
@@ -99,11 +99,10 @@ static_library("browser") {
     # TODO(blundell): Provide the iOS login DB implementation and then
     # also exclude the POSIX one from iOS. http://crbug.com/341429
     sources -= [ "login_database_posix.cc" ]
-  } else if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
   }
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   public_configs = [ ":password_manager_config" ]
 
   # Sync (not supported in Android WebView).
diff --git a/components/pdf/renderer/BUILD.gn b/components/pdf/renderer/BUILD.gn
index 3ec8040..3a1554e 100644
--- a/components/pdf/renderer/BUILD.gn
+++ b/components/pdf/renderer/BUILD.gn
@@ -14,6 +14,9 @@ static_library("renderer") {
     "ppb_pdf_impl.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     "//base",
     "//components/pdf/common",
@@ -26,8 +29,4 @@ static_library("renderer") {
     "//v8",
     "//third_party/WebKit/public:blink_minimal",
   ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  }
 }
diff --git a/components/printing/renderer/BUILD.gn b/components/printing/renderer/BUILD.gn
index 768c95b..c31bb8e 100644
--- a/components/printing/renderer/BUILD.gn
+++ b/components/printing/renderer/BUILD.gn
@@ -12,6 +12,9 @@ static_library("printing_renderer") {
     "print_web_view_helper_pdf_win.cc",
   ]
 
+  # TODO(dgn): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     "//base",
     "//components/printing/common:printing_common",
@@ -23,9 +26,4 @@ static_library("printing_renderer") {
     "//third_party/WebKit/public:blink",
     "//ui/base",
   ]
-
-  if (is_win) {
-    # TODO(dgn): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
diff --git a/components/signin/core/browser/BUILD.gn b/components/signin/core/browser/BUILD.gn
index 4f4f776..819b418 100644
--- a/components/signin/core/browser/BUILD.gn
+++ b/components/signin/core/browser/BUILD.gn
@@ -43,6 +43,8 @@ static_library("browser") {
     "webdata/token_web_data.h",
   ]
 
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     "//base",
     "//crypto",
@@ -67,11 +69,6 @@ static_library("browser") {
   if (is_chromeos) {
     sources -= [ "signin_manager.cc" ]
   }
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
 
 static_library("test_support") {
diff --git a/components/url_fixer/BUILD.gn b/components/url_fixer/BUILD.gn
index bf29f35..93eac1f3 100644
--- a/components/url_fixer/BUILD.gn
+++ b/components/url_fixer/BUILD.gn
@@ -8,13 +8,11 @@ static_library("url_fixer") {
     "url_fixer.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     "//base",
     "//net",
   ]
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
diff --git a/content/shell/BUILD.gn b/content/shell/BUILD.gn
index 338c565..b0f6e1b 100644
--- a/content/shell/BUILD.gn
+++ b/content/shell/BUILD.gn
@@ -225,6 +225,9 @@ static_library("content_shell_lib") {
     "renderer/test_runner/web_test_runner.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "CONTENT_SHELL_VERSION=\"$content_shell_version\"" ]
 
   public_deps = [
@@ -280,9 +283,6 @@ static_library("content_shell_lib") {
 
   if (is_win) {
     #'LinkIncremental': '<(msvs_large_module_debug_link_mode)',  TODO(GYP)
-
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
     sources += [
       "common/v8_breakpad_support_win.cc",
       "common/v8_breakpad_support_win.h",
diff --git a/courgette/BUILD.gn b/courgette/BUILD.gn
index d277eb9e..f479ea9 100644
--- a/courgette/BUILD.gn
+++ b/courgette/BUILD.gn
@@ -107,10 +107,8 @@ test("courgette_unittests") {
     "third_party/paged_array_unittest.cc",
   ]
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     ":courgette_lib",
diff --git a/crypto/BUILD.gn b/crypto/BUILD.gn
index f6c45aa..d717197 100644
--- a/crypto/BUILD.gn
+++ b/crypto/BUILD.gn
@@ -93,6 +93,9 @@ component("crypto") {
     "third_party/nss/sha512.cc",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     ":platform",
     "//base",
@@ -126,11 +129,6 @@ component("crypto") {
     deps += [ "//third_party/android_tools:cpu_features" ]
   }
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
-
   if (use_openssl) {
     # Remove NSS files when using OpenSSL
     sources -= [
diff --git a/extensions/BUILD.gn b/extensions/BUILD.gn
index b1e69d27..202469a 100644
--- a/extensions/BUILD.gn
+++ b/extensions/BUILD.gn
@@ -70,6 +70,8 @@ source_set("test_support") {
   sources = rebase_path(extensions_gypi_values.extensions_test_support_sources,
                         ".",
                         "//extensions")
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     ":extensions_resources",
@@ -90,10 +92,6 @@ source_set("test_support") {
     "//content/public/browser",
     "//extensions/common/api/cast_channel:cast_channel_proto",
   ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  }
 }
 
 # GYP version: //extensions/extensions.gyp:extensions_shell_and_test_pak
diff --git a/extensions/browser/BUILD.gn b/extensions/browser/BUILD.gn
index a2b49b8..4659457 100644
--- a/extensions/browser/BUILD.gn
+++ b/extensions/browser/BUILD.gn
@@ -30,6 +30,9 @@ source_set("browser") {
     "//third_party/re2",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   if (enable_extensions) {
     # Includes all API implementations and the ExtensionsApiClient
     # interface. Moving an API from src/chrome to src/extensions implies
@@ -97,8 +100,4 @@ source_set("browser") {
       }
     }
   }
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  }
 }
diff --git a/extensions/common/BUILD.gn b/extensions/common/BUILD.gn
index faa1cb8..3cd8117 100644
--- a/extensions/common/BUILD.gn
+++ b/extensions/common/BUILD.gn
@@ -13,10 +13,8 @@ source_set("common_constants") {
       rebase_path(extensions_gypi_values.extensions_common_constants_sources,
                   ".",
                   "//extensions")
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
 
 if (enable_extensions) {
@@ -31,6 +29,8 @@ if (enable_extensions) {
     sources = rebase_path(extensions_gypi_values.extensions_common_sources,
                           ".",
                           "//extensions")
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
     deps = [
       ":common_constants",
@@ -81,9 +81,5 @@ if (enable_extensions) {
                       "//extensions")
       sources += nacl_sources
     }
-
-    if (is_win) {
-      cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    }
   }
 }  # enable_extensions
diff --git a/extensions/renderer/BUILD.gn b/extensions/renderer/BUILD.gn
index a35e723..1bfceef 100644
--- a/extensions/renderer/BUILD.gn
+++ b/extensions/renderer/BUILD.gn
@@ -13,6 +13,9 @@ source_set("renderer") {
                         ".",
                         "//extensions")
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     "//chrome:resources",
     "//content:resources",
@@ -22,8 +25,4 @@ source_set("renderer") {
     "//third_party/WebKit/public:blink",
     "//third_party/mojo/src/mojo/edk/js",
   ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  }
 }
diff --git a/extensions/utility/BUILD.gn b/extensions/utility/BUILD.gn
index 1662c08..52f9d83 100644
--- a/extensions/utility/BUILD.gn
+++ b/extensions/utility/BUILD.gn
@@ -13,13 +13,12 @@ source_set("utility") {
                         ".",
                         "//extensions")
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     "//content/public/utility",
     "//extensions/common",
     "//skia",
   ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  }
 }
diff --git a/google_apis/BUILD.gn b/google_apis/BUILD.gn
index 9d10b9e..1cdf686 100644
--- a/google_apis/BUILD.gn
+++ b/google_apis/BUILD.gn
@@ -122,11 +122,10 @@ source_set("google_apis") {
     "google_api_keys.h",
   ]
 
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # size_t -> int
-  }
-
-  configs += [ ":key_defines" ]
+  configs += [
+    ":key_defines",
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
 
   deps = [
     "//base",
diff --git a/gpu/blink/BUILD.gn b/gpu/blink/BUILD.gn
index 464061c..7d08ba11 100644
--- a/gpu/blink/BUILD.gn
+++ b/gpu/blink/BUILD.gn
@@ -14,6 +14,9 @@ component("blink") {
     "webgraphicscontext3d_in_process_command_buffer_impl.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "GPU_BLINK_IMPLEMENTATION" ]
 
   deps = [
@@ -33,9 +36,4 @@ component("blink") {
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
diff --git a/gpu/command_buffer/client/BUILD.gn b/gpu/command_buffer/client/BUILD.gn
index 2d28d1a..a5532cb 100644
--- a/gpu/command_buffer/client/BUILD.gn
+++ b/gpu/command_buffer/client/BUILD.gn
@@ -19,10 +19,8 @@ source_set("client") {
 
   defines = [ "GPU_IMPLEMENTATION" ]
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]  # size_t to int truncation.
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   all_dependent_configs = [ "//third_party/khronos:khronos_headers" ]
 
@@ -56,10 +54,8 @@ source_set("gles2_cmd_helper_sources") {
 
   defines = [ "GPU_IMPLEMENTATION" ]
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]  # size_t to int truncation.
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     ":client",
@@ -129,14 +125,12 @@ source_set("gpu_memory_buffer_manager") {
 component("gles2_implementation") {
   sources = gles2_implementation_source_files
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "GLES2_IMPL_IMPLEMENTATION" ]
   all_dependent_configs = [ "//third_party/khronos:khronos_headers" ]
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]  # size_t to int truncation.
-  }
-
   deps = [
     ":gles2_cmd_helper",
     ":gles2_interface",
@@ -171,10 +165,8 @@ component("gles2_c_lib") {
   sources = gles2_c_lib_source_files
   defines = [ "GLES2_C_LIB_IMPLEMENTATION" ]
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]  # size_t to int truncation.
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     ":client",
diff --git a/gpu/config/BUILD.gn b/gpu/config/BUILD.gn
index 1d86e69..4d068ed 100644
--- a/gpu/config/BUILD.gn
+++ b/gpu/config/BUILD.gn
@@ -45,6 +45,9 @@ source_set("config") {
     "software_rendering_list_json.cc",
   ]
 
+  # TODO(jschuh): size_t to int.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "GPU_IMPLEMENTATION" ]
 
   deps = [
@@ -69,9 +72,6 @@ source_set("config") {
         "//third_party/amd/amd_videocard_info_win.cc",
       ]
     }
-
-    # TODO(jschuh): size_t to int.
-    cflags = [ "/wd4267" ]
   }
   if (use_libpci) {
     defines += [ "USE_LIBPCI=1" ]
diff --git a/media/BUILD.gn b/media/BUILD.gn
index 864eafe..1e7da3f 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -252,7 +252,12 @@ component("media") {
     "video/video_encode_accelerator.h",
   ]
 
-  configs += [ ":media_config" ]
+  configs += [
+    ":media_config",
+    # TODO(wolenetz): Fix size_t to int trunctaion in win64.
+    # See http://crbug.com/171009
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
   all_dependent_configs = [ ":media_dependent_config" ]
 
   cflags = []
@@ -394,8 +399,6 @@ component("media") {
       "mfreadwrite.lib",
       "mfuuid.lib",
     ]
-    cflags += [ "/wd4267" ]  # TODO(wolenetz): Fix size_t to int trunctaion in win64. See
-                             # http://crbug.com/171009
   }
 
   if (proprietary_codecs) {
@@ -579,6 +582,10 @@ test("media_unittests") {
     "video/h264_poc_unittest.cc",
   ]
 
+  # TODO(wolenetz): Fix size_t to int trunctaion in win64.
+  # See http://crbug.com/171009
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     ":media",
     ":test_support",
@@ -649,11 +656,6 @@ test("media_unittests") {
     ]
   }
 
-  if (is_win && cpu_arch == "x64") {
-    cflags = [ "/wd4267" ]  # TODO(wolenetz): Fix size_t to int trunctaion in win64. See
-                            # http://crbug.com/171009
-  }
-
   if (is_mac || is_ios) {
     deps += [ "//media/base/mac" ]
   }
diff --git a/media/cdm/ppapi/BUILD.gn b/media/cdm/ppapi/BUILD.gn
index 69369e2..9a85bd3 100644
--- a/media/cdm/ppapi/BUILD.gn
+++ b/media/cdm/ppapi/BUILD.gn
@@ -21,6 +21,9 @@ shared_library("clearkeycdm") {
     "external_clear_key/clear_key_cdm_common.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "CDM_IMPLEMENTATION" ]
 
   deps = [
@@ -41,11 +44,6 @@ shared_library("clearkeycdm") {
     deps += [ "//third_party/ffmpeg" ]
   }
 
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
-
   # TODO(GYP) on Mac: 'DYLIB_INSTALL_NAME_BASE': '@loader_path',
 }
 
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 4935b67..6b9c93e 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -61,14 +61,6 @@ config("net_config") {
   }
 }
 
-# Disables Windows warning about size to int truncations.
-# TODO(jschuh): crbug.com/167187 fix this and delete this config.
-config("net_win_size_truncation") {
-  if (is_win) {
-    cflags = [ "/wd4267" ]
-  }
-}
-
 component("net") {
   sources =
       gypi_values.net_nacl_common_sources + gypi_values.net_non_nacl_sources
@@ -83,7 +75,8 @@ component("net") {
     "DLOPEN_KERBEROS",
     "NET_IMPLEMENTATION",
   ]
-  configs += [ ":net_win_size_truncation" ]
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
   public_configs = [ ":net_config" ]
   include_dirs = []
 
@@ -568,8 +561,8 @@ static_library("http_server") {
     "server/web_socket_encoder.h",
   ]
   configs += [
+    "//build/config/compiler:no_size_t_to_int_warning",
     "//build/config/compiler:wexit_time_destructors",
-    ":net_win_size_truncation",
   ]
   deps = [
     ":net",
@@ -593,7 +586,8 @@ executable("dump_cache") {
     "tools/dump_cache/url_utilities.h",
   ]
 
-  configs += [ ":net_win_size_truncation" ]
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     "//base",
@@ -691,7 +685,8 @@ source_set("test_support") {
     "url_request/url_request_test_util.h",
   ]
 
-  configs += [ ":net_win_size_truncation" ]
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   public_deps = [
     "//base",
@@ -774,7 +769,7 @@ if (use_v8_in_net) {
 
     defines = [ "NET_IMPLEMENTATION" ]
     configs += [
-      ":net_win_size_truncation",
+      "//build/config/compiler:no_size_t_to_int_warning",
       "//build/config/compiler:wexit_time_destructors",
     ]
 
@@ -825,7 +820,8 @@ if (!is_ios && !is_android) {
     sources = [
       "tools/crash_cache/crash_cache.cc",
     ]
-    configs += [ ":net_win_size_truncation" ]
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     deps = [
       ":net",
       ":test_support",
@@ -838,7 +834,8 @@ if (!is_ios && !is_android) {
     sources = [
       "tools/crl_set_dump/crl_set_dump.cc",
     ]
-    configs += [ ":net_win_size_truncation" ]
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     deps = [
       ":net",
       "//base",
@@ -850,7 +847,8 @@ if (!is_ios && !is_android) {
     sources = [
       "tools/dns_fuzz_stub/dns_fuzz_stub.cc",
     ]
-    configs += [ ":net_win_size_truncation" ]
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     deps = [
       ":net",
       "//base",
@@ -874,7 +872,8 @@ if (!is_ios && !is_android) {
     sources = [
       "tools/get_server_time/get_server_time.cc",
     ]
-    configs += [ ":net_win_size_truncation" ]
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     deps = [
       ":net",
       "//base",
@@ -925,7 +924,8 @@ if (!is_ios && !is_android) {
     sources = [
       "disk_cache/blockfile/stress_cache.cc",
     ]
-    configs += [ ":net_win_size_truncation" ]
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     deps = [
       ":net",
       ":test_support",
@@ -937,7 +937,8 @@ if (!is_ios && !is_android) {
     sources = [
       "tools/tld_cleanup/tld_cleanup.cc",
     ]
-    configs += [ ":net_win_size_truncation" ]
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     deps = [
       "//base",
       "//base:i18n",
@@ -1161,7 +1162,8 @@ if (!is_android && !is_win && !is_mac) {
   test("net_unittests") {
     sources = gypi_values.net_test_sources
 
-    configs += [ ":net_win_size_truncation" ]
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
     defines = []
 
     deps = [
diff --git a/net/third_party/nss/ssl/BUILD.gn b/net/third_party/nss/ssl/BUILD.gn
index 002bace..a40b71b 100644
--- a/net/third_party/nss/ssl/BUILD.gn
+++ b/net/third_party/nss/ssl/BUILD.gn
@@ -70,8 +70,6 @@ component("libssl") {
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
   if (is_win) {
-    cflags += [ "/wd4267" ]  # Disable warning: Conversion from size_t to 'type'.
-
     sources -= [
       "unix_err.c",
       "unix_err.h",
diff --git a/pdf/BUILD.gn b/pdf/BUILD.gn
index 49f49a4..0f74323 100644
--- a/pdf/BUILD.gn
+++ b/pdf/BUILD.gn
@@ -45,6 +45,9 @@ static_library("pdf") {
     "thumbnail_control.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   if (pdf_engine == 0) {
     sources += [
       "pdfium/pdfium_api_string_buffer_adapter.cc",
@@ -63,10 +66,6 @@ static_library("pdf") {
     ]
   }
 
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh) size_t to int truncations.
-  }
-
   deps = [
     "//base",
     "//components/ui/zoom:ui_zoom",
diff --git a/rlz/BUILD.gn b/rlz/BUILD.gn
index f889137..9c44dad 100644
--- a/rlz/BUILD.gn
+++ b/rlz/BUILD.gn
@@ -55,6 +55,9 @@ source_set("rlz_lib") {
     "win/lib/rlz_value_store_registry.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   public_configs = [ ":rlz_config" ]
 
   deps = [
@@ -73,9 +76,6 @@ source_set("rlz_lib") {
       "mac/lib/rlz_value_store_mac.h",
     ]
     set_sources_assignment_filter(sources_assignment_filter)
-  } else if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
   }
 }
 
@@ -106,6 +106,9 @@ test("rlz_unittests") {
     "win/lib/machine_deal_test.cc",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     ":rlz_lib",
     ":test_support",
@@ -116,11 +119,6 @@ test("rlz_unittests") {
     "//testing/gtest",
     "//third_party/zlib",
   ]
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
 
 executable("rlz_id") {
diff --git a/sql/BUILD.gn b/sql/BUILD.gn
index 7c4d3f0..8b75d80 100644
--- a/sql/BUILD.gn
+++ b/sql/BUILD.gn
@@ -21,11 +21,10 @@ component("sql") {
     "transaction.h",
   ]
 
-  defines = [ "SQL_IMPLEMENTATION" ]
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # size_t to int.
-  }
+  defines = [ "SQL_IMPLEMENTATION" ]
 
   deps = [
     "//base",
@@ -68,9 +67,8 @@ test("sql_unittests") {
     "transaction_unittest.cc",
   ]
 
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # size_t -> int
-  }
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     ":sql",
diff --git a/storage/browser/BUILD.gn b/storage/browser/BUILD.gn
index 42e6a99..61e76c7a 100644
--- a/storage/browser/BUILD.gn
+++ b/storage/browser/BUILD.gn
@@ -170,10 +170,11 @@ component("browser") {
   ]
 
   defines = [ "STORAGE_BROWSER_IMPLEMENTATION" ]
-  configs += [ "//build/config/compiler:wexit_time_destructors" ]
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): fix size_t to int truncations.
-  }
+  configs += [
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    "//build/config/compiler:no_size_t_to_int_warning",
+    "//build/config/compiler:wexit_time_destructors",
+  ]
 
   deps = [
     "//base",
diff --git a/storage/common/BUILD.gn b/storage/common/BUILD.gn
index 0067972..2c55bb9 100644
--- a/storage/common/BUILD.gn
+++ b/storage/common/BUILD.gn
@@ -26,10 +26,10 @@ component("common") {
     "quota/quota_types.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "STORAGE_COMMON_IMPLEMENTATION" ]
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): fix size_t to int truncations.
-  }
 
   deps = [
     "//base",
diff --git a/third_party/boringssl/BUILD.gn b/third_party/boringssl/BUILD.gn
index d245868..9c75f1b 100644
--- a/third_party/boringssl/BUILD.gn
+++ b/third_party/boringssl/BUILD.gn
@@ -52,7 +52,12 @@ component("boringssl") {
   }
 
   configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
+  configs += [
+    "//build/config/compiler:no_chromium_code",
+    # TODO(davidben): Fix size_t truncations in BoringSSL.
+    # https://crbug.com/429039
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
 
   # Also gets the include dirs from :openssl_config
   include_dirs = [
@@ -64,12 +69,6 @@ component("boringssl") {
     "src/crypto",
   ]
 
-  if (is_win) {
-    # TODO(davidben): Fix size_t truncations in BoringSSL.
-    # https://crbug.com/429039
-    cflags += [ "/wd4267" ]
-  }
-
   if (cpu_arch == "x64") {
     if (is_mac) {
       sources += gypi_values.boringssl_mac_x86_64_sources
diff --git a/third_party/cld/BUILD.gn b/third_party/cld/BUILD.gn
index ed4075d..7a0c0eb 100644
--- a/third_party/cld/BUILD.gn
+++ b/third_party/cld/BUILD.gn
@@ -102,7 +102,6 @@ source_set("cld") {
       "/wd4005",  # Macro defined twice.
       "/wd4006",  # #undef expected an identifier.
       "/wd4309",  # Truncation of constant value.
-      "/wd4267",  # TODO(jschuh): C4267: http://crbug.com/167187 size_t -> int
     ]
   } else {
     defines = [ "COMPILER_GCC" ]
diff --git a/third_party/cld_2/BUILD.gn b/third_party/cld_2/BUILD.gn
index bede93a..8098eba 100644
--- a/third_party/cld_2/BUILD.gn
+++ b/third_party/cld_2/BUILD.gn
@@ -48,10 +48,6 @@ source_set("cld2_data") {
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # size_t -> int conversion.
-  }
 }
 
 # As in the corresponding gyp file, this just builds the core interfaces for
@@ -66,10 +62,6 @@ source_set("cld_2") {
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # size_t -> int conversion.
-  }
 }
 
 source_set("cld2_platform_impl") {
@@ -94,10 +86,6 @@ static_library("cld2_static") {
   ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # size_t -> int conversion.
-  }
 }
 
 config("cld2_dynamic_mode_config") {
@@ -114,13 +102,9 @@ static_library("cld2_dynamic") {
 
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
-    "//build/config/compiler:no_chromium_code",
     ":cld2_dynamic_mode_config",
+    "//build/config/compiler:no_chromium_code",
   ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # size_t -> int conversion.
-  }
 }
 
 # Does not build on Windows.
@@ -144,12 +128,8 @@ if (!is_win) {
 
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [
-      "//build/config/compiler:no_chromium_code",
       ":cld2_dynamic_mode_config",
+      "//build/config/compiler:no_chromium_code",
     ]
-
-    if (is_win) {
-      cflags = [ "/wd4267" ]  # size_t -> int conversion.
-    }
   }
 }
diff --git a/third_party/harfbuzz-ng/BUILD.gn b/third_party/harfbuzz-ng/BUILD.gn
index 000a9cc..6e93e04 100644
--- a/third_party/harfbuzz-ng/BUILD.gn
+++ b/third_party/harfbuzz-ng/BUILD.gn
@@ -162,7 +162,6 @@ if (use_system_harfbuzz) {
     }
     if (is_win) {
       cflags += [
-        "/wd4267",  # size_t to 'type' converion.
         "/wd4334",  # Result of 32-bit shift implicitly converted to 64 bits.
       ]
     }
diff --git a/third_party/libexif/BUILD.gn b/third_party/libexif/BUILD.gn
index b2b4fed..be8caf6 100644
--- a/third_party/libexif/BUILD.gn
+++ b/third_party/libexif/BUILD.gn
@@ -53,7 +53,6 @@ if (!is_linux || is_chromeos) {
 
       cflags = [
         "/wd4018",  # size/unsigned mismatch
-        "/wd4267",  # size_t -> ExifLong truncation on amd64
       ]
 
       # TODO(GYP): Handle /analyze switch, when it will be used in GN.
diff --git a/third_party/libjingle/BUILD.gn b/third_party/libjingle/BUILD.gn
index 6357b92..fc13ff1 100644
--- a/third_party/libjingle/BUILD.gn
+++ b/third_party/libjingle/BUILD.gn
@@ -256,6 +256,10 @@ static_library("libjingle") {
     "$p2p_dir/base/constants.cc",
     "$p2p_dir/base/constants.h",
   ]
+
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   public_deps = [
     ":jingle_deps",
   ]
@@ -266,10 +270,7 @@ static_library("libjingle") {
 
   # From libjingle_common.gypi's conditions list.
   if (is_win) {
-    cflags = [
-      "/wd4005",
-      "/wd4267",
-    ]
+    cflags = [ "/wd4005" ]
   }
 
   configs += [ ":jingle_unexported_configs" ]
diff --git a/third_party/libpng/BUILD.gn b/third_party/libpng/BUILD.gn
index 488ef43..787d4fa 100644
--- a/third_party/libpng/BUILD.gn
+++ b/third_party/libpng/BUILD.gn
@@ -52,12 +52,8 @@ source_set("libpng_sources") {
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): http://crbug.com/167187
-
-    if (component_mode == "shared_library") {
-      defines = [ "PNG_BUILD_DLL" ]
-    }
+  if (is_win && is_component_build) {
+    defines = [ "PNG_BUILD_DLL" ]
   }
 
   public_configs = [ ":libpng_config" ]
diff --git a/third_party/protobuf/BUILD.gn b/third_party/protobuf/BUILD.gn
index 1367d8a..6825f1e 100644
--- a/third_party/protobuf/BUILD.gn
+++ b/third_party/protobuf/BUILD.gn
@@ -17,11 +17,6 @@ config("protobuf_config") {
     "GOOGLE_PROTOBUF_NO_RTTI",
     "GOOGLE_PROTOBUF_NO_STATIC_INITIALIZER",
   ]
-
-  if (is_win) {
-    # TODO(jschuh): http://crbug.com/167187 size_t -> int.
-    cflags = [ "/wd4267" ]
-  }
 }
 
 if (component_mode == "shared_library") {
@@ -98,7 +93,11 @@ component("protobuf_lite") {
   if (is_win) {
     configs -= [ "//build/config/win:lean_and_mean" ]
   }
-  public_configs = [ ":protobuf_config" ]
+  public_configs = [
+    ":protobuf_config",
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
 
   cflags = protobuf_lite_cflags
 
@@ -177,7 +176,11 @@ source_set("protobuf_full") {
   if (is_win) {
     configs -= [ "//build/config/win:lean_and_mean" ]
   }
-  public_configs = [ ":protobuf_config" ]
+  public_configs = [
+    ":protobuf_config",
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
 
   cflags = protobuf_lite_cflags
 }
diff --git a/third_party/re2/BUILD.gn b/third_party/re2/BUILD.gn
index d022e4f..2bc130a 100644
--- a/third_party/re2/BUILD.gn
+++ b/third_party/re2/BUILD.gn
@@ -67,10 +67,7 @@ static_library("re2") {
 
   if (is_win) {
     include_dirs = [ "mswin" ]
-    cflags = [
-      "/wd4267",  # Conversion from size_t.
-      "/wd4722",  # Destructor never terminates.
-    ]
+    cflags = [ "/wd4722" ]  # Destructor never terminates.
   } else {
     sources -= [ "mswin/stdint.h" ]
   }
diff --git a/third_party/smhasher/BUILD.gn b/third_party/smhasher/BUILD.gn
index e1bbb5e..fd9088c 100644
--- a/third_party/smhasher/BUILD.gn
+++ b/third_party/smhasher/BUILD.gn
@@ -27,9 +27,4 @@ source_set("cityhash") {
   ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
-
-  if (is_win) {
-    # TODO(jschuh): http://code.google.com/p/smhasher/issues/detail?id=19
-    cflags = [ "/wd4267" ]
-  }
 }
diff --git a/third_party/snappy/BUILD.gn b/third_party/snappy/BUILD.gn
index 0f440a5..4af0e81 100644
--- a/third_party/snappy/BUILD.gn
+++ b/third_party/snappy/BUILD.gn
@@ -36,9 +36,4 @@ static_library("snappy") {
     # https://code.google.com/p/snappy/issues/detail?id=70
     configs -= [ "//build/config/clang:extra_warnings" ]
   }
-
-  if (is_win) {
-    # https://code.google.com/p/snappy/issues/detail?id=75
-    cflags = [ "/wd4267" ]  # Conversion from size_t to 'type'.
-  }
 }
diff --git a/third_party/sqlite/BUILD.gn b/third_party/sqlite/BUILD.gn
index 6f301ca..62efc0a 100644
--- a/third_party/sqlite/BUILD.gn
+++ b/third_party/sqlite/BUILD.gn
@@ -65,9 +65,7 @@ source_set("sqlite") {
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
 
-  if (is_win) {
-    cflags += [ "/wd4267" ]  # Conversion from size_t to "type".
-  } else if (is_linux) {
+  if (is_linux) {
     cflags += [
       # SQLite doesn"t believe in compiler warnings,
       # preferring testing.
diff --git a/third_party/yasm/BUILD.gn b/third_party/yasm/BUILD.gn
index cd9b453..3c5215e 100644
--- a/third_party/yasm/BUILD.gn
+++ b/third_party/yasm/BUILD.gn
@@ -148,8 +148,6 @@ if (current_toolchain == host_toolchain) {
     # re2c is missing CLOSEVOP from one switch.
     if (is_posix) {
       cflags = [ "-Wno-switch" ]
-    } else if (is_win) {
-      cflags = [ "/wd4267" ]  # size_t to int conversion.
     }
   }
 
@@ -248,9 +246,7 @@ if (current_toolchain == host_toolchain) {
     # directory, but the gen_x86_insn.py script does not make this easy.
     include_dirs = [ yasm_gen_include_dir ]
 
-    if (is_win) {
-      cflags = [ "/wd4267" ]  # size_t to int conversion.
-    } else {
+    if (!is_win) {
       cflags = [
         "-ansi",
         "-pedantic",
diff --git a/tools/json_schema_compiler/test/BUILD.gn b/tools/json_schema_compiler/test/BUILD.gn
index 76ae1b9..f91e699 100644
--- a/tools/json_schema_compiler/test/BUILD.gn
+++ b/tools/json_schema_compiler/test/BUILD.gn
@@ -36,12 +36,11 @@ source_set("test") {
     "test_util.cc",
     "test_util.h",
   ]
+
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   public_deps = [
     ":api",
   ]
-
-  if (is_win) {
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
 }
diff --git a/ui/aura/BUILD.gn b/ui/aura/BUILD.gn
index e032d67..9a330fb 100644
--- a/ui/aura/BUILD.gn
+++ b/ui/aura/BUILD.gn
@@ -176,6 +176,9 @@ source_set("test_support") {
     "test/window_test_api.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   public_deps = [
     ":aura",
   ]
@@ -194,8 +197,6 @@ source_set("test_support") {
 
   if (is_win) {
     sources += [ "test/ui_controls_factory_aurawin.cc" ]
-
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   }
 
   if (use_x11) {
diff --git a/ui/base/BUILD.gn b/ui/base/BUILD.gn
index c3eb671..a99a649 100644
--- a/ui/base/BUILD.gn
+++ b/ui/base/BUILD.gn
@@ -294,6 +294,9 @@ component("base") {
     sources += [ "touch/touch_device.cc" ]
   }
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "UI_BASE_IMPLEMENTATION" ]
 
   public_deps = [
@@ -414,7 +417,6 @@ component("base") {
     ]
     deps += [ "//third_party/wtl" ]
     cflags = [
-      "/wd4267",  # TODO(jschuh): C4267: http://crbug.com/167187 size_t -> int.
       "/wd4324",  # Structure was padded due to __declspec(align()), which is
                   # uninteresting.
     ]
@@ -701,6 +703,9 @@ test("ui_base_unittests") {
     }
   }
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     "//base",
     "//base/allocator",
@@ -746,9 +751,6 @@ test("ui_base_unittests") {
       "imm32.lib",
       "oleacc.lib",
     ]
-
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
   }
 
   if (!is_win || !use_aura) {
diff --git a/ui/base/ime/BUILD.gn b/ui/base/ime/BUILD.gn
index 53b002e..e697402 100644
--- a/ui/base/ime/BUILD.gn
+++ b/ui/base/ime/BUILD.gn
@@ -99,6 +99,9 @@ component("ime") {
     "win/tsf_input_scope.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "UI_BASE_IME_IMPLEMENTATION" ]
 
   deps = [
@@ -164,7 +167,6 @@ component("ime") {
 
   if (is_win) {
     cflags = [
-      "/wd4267",  # TODO(jschuh): C4267: http://crbug.com/167187 size_t -> int.
       "/wd4324",  # Structure was padded due to __declspec(align()), which is
                   # uninteresting.
     ]
diff --git a/ui/gfx/BUILD.gn b/ui/gfx/BUILD.gn
index 003c5fd..5485a05 100644
--- a/ui/gfx/BUILD.gn
+++ b/ui/gfx/BUILD.gn
@@ -224,6 +224,9 @@ component("gfx") {
     "win/window_impl.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "GFX_IMPLEMENTATION" ]
 
   deps = [
@@ -307,7 +310,6 @@ component("gfx") {
   # Windows.
   if (is_win) {
     cflags = [
-      "/wd4267",  # TODO(jschuh): C4267: http://crbug.com/167187 size_t -> int.
       "/wd4324",  # Structure was padded due to __declspec(align()), which is
                   # uninteresting.
     ]
@@ -452,6 +454,9 @@ test("gfx_unittests") {
     ]
   }
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   deps = [
     ":gfx",
     ":test_support",
@@ -511,9 +516,6 @@ test("gfx_unittests") {
       "imm32.lib",
       "oleacc.lib",
     ]
-
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
   }
 }
 
diff --git a/ui/message_center/BUILD.gn b/ui/message_center/BUILD.gn
index c6482de..b295019 100644
--- a/ui/message_center/BUILD.gn
+++ b/ui/message_center/BUILD.gn
@@ -23,6 +23,9 @@ component("message_center") {
     "//url",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "MESSAGE_CENTER_IMPLEMENTATION" ]
 
   if (enable_notifications && !is_android) {
@@ -74,8 +77,6 @@ component("message_center") {
     ]
 
     if (is_win) {
-      # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-      cflags = [ "/wd4267" ]
       deps += [ "//ui/aura" ]
     }
 
diff --git a/ui/views/BUILD.gn b/ui/views/BUILD.gn
index 726288c..be6c0da 100644
--- a/ui/views/BUILD.gn
+++ b/ui/views/BUILD.gn
@@ -14,6 +14,9 @@ gypi_values = exec_script("//build/gypi_to_gn.py",
 component("views") {
   sources = gypi_values.views_sources
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "VIEWS_IMPLEMENTATION" ]
 
   deps = [
@@ -67,7 +70,6 @@ component("views") {
 
   if (is_win) {
     sources += gypi_values.views_win_sources
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     libs = [
       "imm32.lib",
       "oleacc.lib",
diff --git a/ui/views/examples/BUILD.gn b/ui/views/examples/BUILD.gn
index c4289d8..455b06c 100644
--- a/ui/views/examples/BUILD.gn
+++ b/ui/views/examples/BUILD.gn
@@ -61,6 +61,9 @@ component("views_examples_lib") {
     "widget_example.h",
   ]
 
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   defines = [ "VIEWS_EXAMPLES_IMPLEMENTATION" ]
 
   deps = [
@@ -78,9 +81,6 @@ component("views_examples_lib") {
 
   if (is_win) {
     deps += [ "//third_party/wtl" ]
-
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
   }
 
   if (use_aura) {
diff --git a/url/BUILD.gn b/url/BUILD.gn
index 03e90cb..964a08b 100644
--- a/url/BUILD.gn
+++ b/url/BUILD.gn
@@ -58,11 +58,11 @@ component("url") {
 
   defines = [ "URL_IMPLEMENTATION" ]
 
-  configs += [ ":url_icu_config" ]
-
-  if (is_win) {
-    cflags = [ "/wd4267" ]  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  }
+  configs += [
+    ":url_icu_config",
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
 
   deps = [
     "//base",
@@ -101,19 +101,15 @@ if (!is_android) {
       "url_util_unittest.cc",
     ]
 
+    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
     #if (is_posix && !is_mac && !is_ios) {
     #  if (use_allocator!="none") {
     #    deps += "//base/allocator"
     #  }
     #}
 
-    if (is_win) {
-      cflags = [
-        # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-        "/wd4267",
-      ]
-    }
-
     deps = [
       ":url",
       "//base",
diff --git a/webkit/common/gpu/BUILD.gn b/webkit/common/gpu/BUILD.gn
index 43e0a64..35b30bd 100644
--- a/webkit/common/gpu/BUILD.gn
+++ b/webkit/common/gpu/BUILD.gn
@@ -15,11 +15,11 @@ component("gpu") {
   ]
 
   defines = [ "WEBKIT_GPU_IMPLEMENTATION" ]
-  configs += [ "//build/config/compiler:wexit_time_destructors" ]
-  if (is_win) {
+  configs += [
+    "//build/config/compiler:wexit_time_destructors",
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags = [ "/wd4267" ]
-  }
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
 
   deps = [
     "//base",
diff --git a/win8/BUILD.gn b/win8/BUILD.gn
index 84d7972..fe2a830 100644
--- a/win8/BUILD.gn
+++ b/win8/BUILD.gn
@@ -29,6 +29,10 @@ source_set("test_support_win8") {
     "//base",
     ":test_registrar_constants",
   ]
+
+  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
+
   sources = [
     "test/metro_registration_helper.cc",
     "test/metro_registration_helper.h",
@@ -39,9 +43,6 @@ source_set("test_support_win8") {
     "test/ui_automation_client.cc",
     "test/ui_automation_client.h",
   ]
-
-  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  cflags = [ "/wd4267" ]
 }
 
 source_set("test_registrar_constants") {