Adding build-time option to enable the tracing of skia events in

skia/skia.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'targets': [
     {
       'target_name': 'skia',
       'type': '<(component)',
       'variables': {
@@ skipping 703 matching lines @@
         'ext/platform_canvas_skia.cc',
         'ext/platform_canvas_win.cc',
         'ext/platform_device.cc',
         'ext/platform_device.h',
         'ext/platform_device_linux.cc',
         'ext/platform_device_mac.cc',
         'ext/platform_device_win.cc',
         'ext/SkMemory_new_handler.cpp',
         'ext/skia_sandbox_support_win.h',
         'ext/skia_sandbox_support_win.cc',
+        'ext/skia_trace_shim.h',
         'ext/skia_utils_mac.mm',
         'ext/skia_utils_mac.h',
         'ext/skia_utils_win.cc',
         'ext/skia_utils_win.h',
         'ext/vector_canvas.cc',
         'ext/vector_canvas.h',
         'ext/vector_platform_device_emf_win.cc',
         'ext/vector_platform_device_emf_win.h',
         'ext/vector_platform_device_skia.cc',
         'ext/vector_platform_device_skia.h',
@@ skipping 515 matching lines @@
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'ext/image_operations_bench.cc',
       ],
     },
   ],
 }