Partial revert of https://codereview.chromium.org/1738913002/ (Enable RAW codec for Windows)

gyp/common_variables.gypi

 # Copyright 2012 The Android Open Source Project
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   # Get ready for the ugly...
   #
   # - We have to nest our variables dictionaries multiple levels deep, so that
   #   this and other gyp files can rely on previously-set variable values in
@@ skipping 35 matching lines @@
         'variables': { # level 4
           # We use 'skia_os' instead of 'OS' throughout our gyp files, to allow
           # for cross-compilation (e.g. building for either MacOS or iOS on Mac).
           # We set it automatically based on 'OS' (the host OS), but allow the
           # user to override it via GYP_DEFINES if they like.
           'skia_os%': '<(OS)',
         },
         'skia_os%': '<(skia_os)',
         'vulkan_merged_into_skia': '1',
         'skia_android_framework%': 0,
-        # RAW codec needs exceptions. Due to that, it is a separate target. Its usage can be
-        # controlled by skia_codec_decodes_raw.
-        'skia_codec_decodes_raw%': 1,
         'conditions' : [
           [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "mac"]', {
             'skia_arch_type%': 'x86_64',
           }, {
             'skia_arch_type%': 'x86',
           }],
+          # RAW codec needs exceptions. Due to that, it is a separate target. Its usage can be
+          # controlled by skia_codec_decodes_raw.
+          ['skia_os == "win"', {
+            'skia_codec_decodes_raw%' : 0,
+          }, {
+            'skia_codec_decodes_raw%' : 1,
+          }],
         ],
         'arm_version%': 0,
         'arm_neon%': 0,
         'skia_egl%': 0,
       },
 
       # Re-define all variables defined within the level-3 'variables' dict,
       # so that siblings of the level-2 'variables' dict can see them.
       # (skia_os will depend on skia_android_framework.)
       'skia_android_framework%': '<(skia_android_framework)',
@@ skipping 180 matching lines @@
         #'-ffast-math',           # Optimize float math even when it breaks IEEE compliance.
         #'-flto'                  # Enable link-time optimization.
     ],
 
     # These are referenced by our .gypi files that list files (e.g. core.gypi)
     #
     'skia_src_path%': '../src',
     'skia_include_path%': '../include',
   },
 }