Disable warnings failing when using Clang on Windows

webrtc/base/base_tests.gyp

Index: webrtc/base/base_tests.gyp
diff --git a/webrtc/base/base_tests.gyp b/webrtc/base/base_tests.gyp
index b8131974225602a03e73550868dd21d8de44d004..5d73d507560ce29fbb7c058bb5d8af70effe8293 100644
--- a/webrtc/base/base_tests.gyp
+++ b/webrtc/base/base_tests.gyp
@@ -134,6 +134,18 @@
               'win32windowpicker_unittest.cc',
             ],
           }],
+          ['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-missing-braces',
+                  '-Wno-unused-const-variable',
+                ],
+              },
+            },
+          }],
           ['OS=="mac"', {
             'sources': [
               'macutils_unittest.cc',