Make gm use SkFlags.

gyp/tools.gyp

Index: gyp/tools.gyp
diff --git a/gyp/tools.gyp b/gyp/tools.gyp
index 4e3bc5361b751d16caca02c3040bca9c9d65132a..2ab5271debacb73702eeadd3af4e253d7222c32c 100644
--- a/gyp/tools.gyp
+++ b/gyp/tools.gyp
@@ -3,8 +3,6 @@
 # To build on Linux:
 #  ./gyp_skia tools.gyp && make tools
 #
-# Building on other platforms not tested yet.
-#
 {
   'includes': [
     'apptype_console.gypi',
@@ -66,12 +64,11 @@
       'type': 'executable',
       'sources': [
         '../tools/skhello.cpp',
-        '../tools/SkFlags.h',
-        '../tools/SkFlags.cpp',
       ],
       'dependencies': [
         'skia_base_libs.gyp:skia_base_libs',
         'effects.gyp:effects',
+        'flags.gyp:flags',
         'images.gyp:images',
       ],
     },
@@ -135,8 +132,6 @@
         '../tools/PictureRenderingFlags.cpp',
         '../tools/CopyTilesRenderer.h',
         '../tools/CopyTilesRenderer.cpp',
-        '../tools/SkFlags.h',
-        '../tools/SkFlags.cpp',
         '../src/pipe/utils/SamplePipeControllers.h',
         '../src/pipe/utils/SamplePipeControllers.cpp',
       ],
@@ -150,6 +145,7 @@
         'effects.gyp:effects',
         'images.gyp:images',
         'tools.gyp:picture_utils',
+        'flags.gyp:flags',
       ],
       'conditions': [
         ['skia_gpu == 1',