GN: Fix windows clang errors. Attempt 2.

webrtc/modules/video_capture/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../../build/webrtc.gni")
 import("//testing/test.gni")
@@ skipping 58 matching lines @@
   config("video_capture_internal_impl_config") {
     if (is_ios) {
       libs = [
         "AVFoundation.framework",
         "CoreMedia.framework",
         "CoreVideo.framework",
       ]
     }
   }
 
+  config("video_capture_internal_impl_warnings_config") {
+    if (is_win && is_clang) {
+      cflags = [
+        "-Wno-comment",
+        "-Wno-ignored-attributes",
+
+        # See https://bugs.chromium.org/p/webrtc/issues/detail?id=6269
+        # for -Wno-ignored-qualifiers
+        "-Wno-ignored-qualifiers",
+        "-Wno-microsoft-extra-qualification",
+        "-Wno-missing-braces",
+        "-Wno-overloaded-virtual",
+        "-Wno-reorder",
+        "-Wno-writable-strings",
+      ]
+    }
+  }
+
   source_set("video_capture_internal_impl") {
+    configs += [ ":video_capture_internal_impl_warnings_config" ]
+
     deps = [
       ":video_capture_module",
       "../../system_wrappers",
     ]
 
     if (is_linux) {
       sources = [
         "linux/device_info_linux.cc",
         "linux/device_info_linux.h",
         "linux/video_capture_linux.cc",
@@ skipping 39 matching lines @@
         "windows/video_capture_ds.h",
         "windows/video_capture_factory_windows.cc",
         "windows/video_capture_mf.cc",
         "windows/video_capture_mf.h",
       ]
 
       libs = [ "Strmiids.lib" ]
 
       deps += [ "//third_party/winsdk_samples" ]
     }
-    if (is_win && is_clang) {
-      cflags = [
-        "-Wno-comment",
-        "-Wno-ignored-attributes",
-        "-Wno-microsoft-extra-qualification",
-        "-Wno-missing-braces",
-        "-Wno-overloaded-virtual",
-        "-Wno-reorder",
-        "-Wno-writable-strings",
-      ]
-    }
     if (is_ios) {
       sources = [
         "ios/device_info_ios.h",
         "ios/device_info_ios.mm",
         "ios/device_info_ios_objc.h",
         "ios/device_info_ios_objc.mm",
         "ios/rtc_video_capture_ios_objc.h",
         "ios/rtc_video_capture_ios_objc.mm",
         "ios/video_capture_ios.h",
         "ios/video_capture_ios.mm",
@@ skipping 63 matching lines @@
       }
 
       if (is_clang) {
         # Suppress warnings from Chrome's Clang plugins.
         # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
         configs -= [ "//build/config/clang:find_bad_constructs" ]
       }
     }
   }
 }