Misc fixes for gn builds with VS 2015

third_party/libexif/BUILD.gn

Index: third_party/libexif/BUILD.gn
diff --git a/third_party/libexif/BUILD.gn b/third_party/libexif/BUILD.gn
index 3f88f1c93edfdc992403f7d650b8a0813af6bc23..ea9ca90ce2a1ac357967938b4ee50c09ee8dcbb8 100644
--- a/third_party/libexif/BUILD.gn
+++ b/third_party/libexif/BUILD.gn
@@ -57,11 +57,16 @@ if (!is_linux || is_chromeos) {
     # TODO(GYP): Additional options for non-Windows platforms.
 
     if (is_win) {
-      defines = [
-        # This seems like a hack, but this is what WebKit Win does.
-        "snprintf=_snprintf",
-        "inline=__inline",
-      ]
+      import("//build/config/win/visual_studio_version.gni")
+
+      if (visual_studio_version == "2013" || visual_studio_version == "2013e") {
+        defines = [
+          # This seems like a hack, but this is what WebKit Win does.
+          # VS 2015 supports these natively so they cannot be #defines.
+          "snprintf=_snprintf",
+          "inline=__inline",
+        ]
+      }
 
       ldflags = [ "/DEF:" + rebase_path("libexif.def") ]