Introduce bindings.gyp

Source/WebCore/WebCore.gypi

Index: Source/WebCore/WebCore.gypi
diff --git a/Source/WebCore/WebCore.gypi b/Source/WebCore/WebCore.gypi
index 4a83b65ffd724839246380200a0112779201fd0f..63a1b8466ca867f58b6a5c6a9fbd91f64d2de943 100644
--- a/Source/WebCore/WebCore.gypi
+++ b/Source/WebCore/WebCore.gypi
@@ -4880,5 +4880,26 @@
             'platform/chromium/support/WrappedResourceRequest.h',
             'platform/chromium/support/WrappedResourceResponse.h',
         ],
+
+        'conditions': [
+            ['OS=="win"', {
+              # Using native perl rather than cygwin perl cuts execution time of idl
+              # preprocessing rules by a bit more than 50%.
+              'perl_exe': '<(DEPTH)/third_party/perl/perl/bin/perl.exe',
+              'gperf_exe': '<(DEPTH)/third_party/gperf/bin/gperf.exe',
+              'bison_exe': '<(DEPTH)/third_party/bison/bin/bison.exe',
+              # Using cl instead of cygwin gcc cuts the processing time from
+              # 1m58s to 0m52s.
+              'preprocessor': '--preprocessor "cl.exe -nologo -EP -TP"',
+            },{
+              'perl_exe': 'perl',
+              'gperf_exe': 'gperf',
+              'bison_exe': 'bison',
+
+              # We specify a preprocess so it happens locally and won't get distributed to goma.
+              # FIXME: /usr/bin/gcc won't exist on OSX forever. We want to use /usr/bin/clang once we require Xcode 4.x.
+              'preprocessor': '--preprocessor "/usr/bin/gcc -E -P -x c++"'
+            }],
+        ],
     }
 }