win clang: don't disable -Wself-assign

third_party/libpng/BUILD.gn

Index: third_party/libpng/BUILD.gn
diff --git a/third_party/libpng/BUILD.gn b/third_party/libpng/BUILD.gn
index 787d4fa7d00ecb3b5e0dd237dd4cec24aa5d5a0e..f67a79f440562e29739e9b7f13a7a0ff0288835c 100644
--- a/third_party/libpng/BUILD.gn
+++ b/third_party/libpng/BUILD.gn
@@ -61,6 +61,10 @@ source_set("libpng_sources") {
   public_deps = [
     "//third_party/zlib",
   ]
+
+  if (is_win && is_clang) {
+    cflags = [ "-Wno-self-assign" ]  # http://crbug.com/505306.

[Nico, 2015/06/29 23:51:02]

Is the plan to fix these? If not and this is supposed to stay here, instead add
a comment what it's needed for. (And it should probably be only `if (is_clang)`
– right now we happen to build third-party code with -Wall with clang-cl but not
with regular clang, but since everything's close to building in that mode we
might as well enable -Wall for third-party code soon too)

[scottmg, 2015/06/30 00:32:55]

Done.

+  }
 }
 
 if (is_win) {