Implement a benchmark for GrResourceCache

gyp/bench.gyp

 # GYP file to build performance testbench.
 #
 {
   'includes': [
     'apptype_console.gypi',
   ],
   'targets': [
     {
       'target_name': 'bench',
       'type': 'executable',
       'include_dirs' : [
         '../src/core',
         '../src/effects',
         '../src/utils',
       ],
       'includes': [
         'bench.gypi'
       ],
       'dependencies': [
         'skia_lib.gyp:skia_lib',
         'bench_timer',
         'flags.gyp:flags',
       ],
       'conditions': [
         ['skia_gpu == 1',
           {
             'include_dirs' : [
               '../src/gpu',
+              '../src/gpu/utils',
             ],
           },
         ],
       ],
     },
     {
       'target_name' : 'bench_timer',
       'type': 'static_library',
       'sources': [
         '../bench/BenchTimer.h',
@@ skipping 47 matching lines @@
       ],
     }
   ],
 }
 
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