Disable warnings failing when using Clang on Windows

webrtc/test/webrtc_test_common.gyp

Index: webrtc/test/webrtc_test_common.gyp
diff --git a/webrtc/test/webrtc_test_common.gyp b/webrtc/test/webrtc_test_common.gyp
index 928ef6b165a1cf2c824649afa4f292702aa8cb97..ad2448e1b26a112ea889e96cffa4846b9f6cd5b8 100644
--- a/webrtc/test/webrtc_test_common.gyp
+++ b/webrtc/test/webrtc_test_common.gyp
@@ -115,6 +115,19 @@
             '<(directx_sdk_path)/Include',
           ],
         }],
+        ['OS=="win" and clang==1', {
+          'msvs_settings': {
+            'VCCLCompilerTool': {
+              'AdditionalOptions': [
+                # Disable warnings failing when compiling with Clang on Windows.
+                # https://bugs.chromium.org/p/webrtc/issues/detail?id=5366
+                '-Wno-bool-conversion',
+                '-Wno-comment',
+                '-Wno-delete-non-virtual-dtor',
+              ],
+            },
+          },
+        }],
       ],
       'dependencies': [
         '<(DEPTH)/testing/gtest.gyp:gtest',