Disable warnings failing when using Clang on Windows

talk/libjingle_tests.gyp

Index: talk/libjingle_tests.gyp
diff --git a/talk/libjingle_tests.gyp b/talk/libjingle_tests.gyp
index 511f7d5ffc6cc3bac5fa5abe3bb476db9ca7b684..e7b354b126b1e07bba8ea1b22a14e2af6fa3af12 100755
--- a/talk/libjingle_tests.gyp
+++ b/talk/libjingle_tests.gyp
@@ -128,6 +128,17 @@
             },
           },
         }],
+        ['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-unused-function',
+              ],
+            },
+          },
+        },],
         ['OS=="ios"', {
           'sources!': [
             'media/sctp/sctpdataengine_unittest.cc',
@@ -240,6 +251,17 @@
             'GTEST_HAS_TR1_TUPLE=1',
            ],
         }],
+        ['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-unused-function',
+              ],
+            },
+          },
+        }],
       ],
     },  # target libjingle_peerconnection_unittest
   ],