Revert of Treat bad values passed to --images as a fatal error

gyp/common_variables.gypi

Index: gyp/common_variables.gypi
diff --git a/gyp/common_variables.gypi b/gyp/common_variables.gypi
index 17c5364afc3cec362a6e7a2441a7511dcb94d34a..abbe729da1365834c229aea65739d46ad545a6ae 100644
--- a/gyp/common_variables.gypi
+++ b/gyp/common_variables.gypi
@@ -37,6 +37,10 @@
   #
   'variables': {  # level 1
     'angle_path%': '../',
+
+    # RAW codec needs exceptions. Due to that, it is a separate target. Its usage can be controlled
+    # by this variable.
+    'skia_codec_decodes_raw%': 1,
 
     'variables': {  # level 2
 
@@ -58,14 +62,6 @@
           }, {
             '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 == "chromeos"', {
-            # FIXME: fix the support for ChromeOS [DNG SDK issue with clock_gettime()].
-            'skia_codec_decodes_raw%' : 0,
-          }, {
-            'skia_codec_decodes_raw%' : 1,
-          }],
         ],
         'arm_version%': 0,
         'arm_neon%': 0,
@@ -76,7 +72,6 @@
       # 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)',
-      'skia_codec_decodes_raw%': '<(skia_codec_decodes_raw)',
       'skia_arch_type%': '<(skia_arch_type)',
       'arm_version%': '<(arm_version)',
       'arm_neon%': '<(arm_neon)',
@@ -219,7 +214,6 @@
     'skia_gpu_extra_tests_path%': '<(skia_gpu_extra_tests_path)',
     'skia_stroke_path_rendering%': '<(skia_stroke_path_rendering)',
     'skia_android_framework%': '<(skia_android_framework)',
-    'skia_codec_decodes_raw%': '<(skia_codec_decodes_raw)',
     'skia_use_android_framework_defines%': '<(skia_use_android_framework_defines)',
     'skia_use_system_json%': '<(skia_use_system_json)',
     'skia_android_path_rendering%': '<(skia_android_path_rendering)',