Test warning suppression with VS 2015

build/config/compiler/BUILD.gn

Index: build/config/compiler/BUILD.gn
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 898b25ff2e07982597603e6b9390211c718ca404..3b125c21c2472934dc470e0738aa268dfe7ada57 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -783,6 +783,12 @@ config("default_warnings") {
         # C4312 is a VS 2015 64-bit warning for integer to larger pointer.
         # TODO(brucedawson): fix warnings, crbug.com/554200
         "/wd4312",
+
+        # TODO(brucedawson): http://crbug.com/593448 4334 is a 'suspicious
+        # shift' warning and 4595 is an 'illegal inline operator new' warning
+        # Both are new in VS 2015 Update 2 and can safely be deferred for now.
+        "/wd4334",
+        "/wd4595",
       ]
     }