Misc fixes for gn builds with VS 2015

third_party/libexif/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Linux should use system libexif
 if (!is_linux || is_chromeos) {
   # TODO(thestig): Properly support building on Linux.
   config("libexif_config") {
     include_dirs = [ "sources" ]
     if (is_clang) {
@@ skipping 39 matching lines @@
       "sources/libexif/pentax/exif-mnote-data-pentax.c",
       "sources/libexif/pentax/mnote-pentax-entry.c",
       "sources/libexif/pentax/mnote-pentax-tag.c",
     ]
 
     include_dirs = [ "sources" ]
 
     # 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") ]
 
       cflags = [ "/wd4018" ]  # Signed/unsigned mismatch in comparison.
 
       # TODO(GYP): Handle /analyze switch, when it will be used in GN.
     } else if (is_linux) {
       libs = [ "m" ]
     }
 
     configs -= [ "//build/config/compiler:chromium_code" ]
     configs += [ "//build/config/compiler:no_chromium_code" ]
 
     public_configs = [ ":libexif_config" ]
   }
 }