Add gyp define to enable vulkan debug layers

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 65 matching lines @@
       'arm_neon%': '<(arm_neon)',
       'skia_egl%': '<(skia_egl)',
       'vulkan_merged_into_skia%': '<(vulkan_merged_into_skia)',
       'conditions': [
         [ 'skia_android_framework == 1', {
           'skia_os%': 'android',
           'skia_chrome_utils%': 0,
           'skia_use_android_framework_defines%': 1,
           'skia_use_system_json%': 1,
           'skia_vulkan%': 1,
+          'skia_vulkan_debug_layers%': 0,
         }, {
           'skia_os%': '<(skia_os)',
           'skia_chrome_utils%': 1,
           'skia_use_android_framework_defines%': 0,
           'skia_use_system_json%': 0,
         }],
         [ 'skia_os == "win"', {
           'os_posix%': 0,
         }, {
           'os_posix%': 1,
@@ skipping 42 matching lines @@
       'skia_resource_cache_mb_limit%': 0,
       'skia_resource_cache_count_limit%': 0,
       'skia_angle%': 0,
       'skia_command_buffer%': 0,
       'skia_gdi%': 0,
       'skia_gpu%': 1,
       'skia_osx_deployment_target%': '',
       'skia_pdf%': 1,
       'skia_profile_enabled%': 0,
       'skia_vulkan%': 0,
+      'skia_vulkan_debug_layers%': 1,
       'skia_win_debuggers_path%': '',
       'skia_shared_lib%': 0,
       'skia_force_distance_field_text%': 0,
       'skia_is_bot%': '<!(python -c "import os; print os.environ.get(\'CHROME_HEADLESS\', 0)")',
 
       # These variables determine the default optimization level for different
       # compilers.
       'skia_default_vs_optimization_level': 3, # full (/Ox)
       'skia_default_gcc_optimization_level': 3, # -O3
     },
@@ skipping 61 matching lines @@
     'skia_android_path_rendering%': '<(skia_android_path_rendering)',
     'skia_resource_cache_mb_limit%': '<(skia_resource_cache_mb_limit)',
     'skia_resource_cache_count_limit%': '<(skia_resource_cache_count_limit)',
     'skia_angle%': '<(skia_angle)',
     'skia_arch_type%': '<(skia_arch_type)',
     'skia_chrome_utils%': '<(skia_chrome_utils)',
     'skia_command_buffer%': '<(skia_command_buffer)',
     'skia_gdi%': '<(skia_gdi)',
     'skia_gpu%': '<(skia_gpu)',
     'skia_vulkan%': '<(skia_vulkan)',
+    'skia_vulkan_debug_layers%': '<(skia_vulkan_debug_layers)',
     'skia_win_exceptions%': 0,
     'skia_win_ltcg%': '<(skia_is_bot)',
     'skia_osx_deployment_target%': '<(skia_osx_deployment_target)',
     'skia_pdf%': '<(skia_pdf)',
     'skia_profile_enabled%': '<(skia_profile_enabled)',
     'skia_shared_lib%': '<(skia_shared_lib)',
     'skia_force_distance_field_text%': '<(skia_force_distance_field_text)',
     'skia_static_initializers%': '<(skia_static_initializers)',
     'ios_sdk_version%': '6.0',
     'skia_win_debuggers_path%': '<(skia_win_debuggers_path)',
@@ skipping 13 matching lines @@
         #'-flto'                  # Enable link-time optimization.
     ],
     'skia_experimental_shadowing': 0,       # for experimental shadow-drawing
 
     # These are referenced by our .gypi files that list files (e.g. core.gypi)
     #
     'skia_src_path%': '../src',
     'skia_include_path%': '../include',
   },
 }