Don't use /ZI on 64 bit windows

gyp/common_conditions.gypi

 # conditions used in both common.gypi and skia.gyp in chromium
 #
 {
   'defines': [
     'SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=<(skia_static_initializers)',
     'SK_SUPPORT_GPU=<(skia_gpu)',
     'SK_SUPPORT_OPENCL=<(skia_opencl)',
     'SK_FORCE_DISTANCE_FIELD_TEXT=<(skia_force_distance_field_text)',
   ],
   'conditions' : [
@@ skipping 111 matching lines @@
           # We handle the 64- vs 32-bit variations elsewhere, so I think it's
           # OK for us to just make these inherit non-archwidth-specific
           # configurations without modification.
           #
           # See http://skbug.com/2442 : These targets cause problems in the
           # MSVS build, so only include them if gyp is generating a ninja build.
           [ '"ninja" in "<!(echo %GYP_GENERATORS%)"', {
             'configurations': {
               'Debug_x64': {
                 'inherit_from': ['Debug'],
+                'msvs_settings': {
+                  'VCCLCompilerTool': {
+                     # /ZI is not supported on 64bit
+                    'DebugInformationFormat': '3', # programDatabase (/Zi)
+                  },
+                },
               },
               'Release_x64': {
                 'inherit_from': ['Release'],
               },
               'Release_Developer_x64': {
                 'inherit_from': ['Release_Developer'],
               },
             },
           }],
           [ 'skia_arch_width == 64', {
@@ skipping 489 matching lines @@
     [ 'skia_is_bot', {
       'defines': [ 'SK_CRASH_HANDLER' ],
     }],
 
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }