Implement a benchmark for GrResourceCache

gyp/bench.gypi

Index: gyp/bench.gypi
diff --git a/gyp/bench.gypi b/gyp/bench.gypi
index 0274176a1c7be2e47311b0c395e918da0b96f839..6346c3f0fd77e2e0c750db361064ff8b0d417fcd 100644
--- a/gyp/bench.gypi
+++ b/gyp/bench.gypi
@@ -31,6 +31,7 @@
     '../bench/GameBench.cpp',
     '../bench/GradientBench.cpp',
     '../bench/GrMemoryPoolBench.cpp',
+    '../bench/GrResourceCacheBench.cpp',
     '../bench/ImageCacheBench.cpp',
     '../bench/ImageDecodeBench.cpp',
     '../bench/InterpBench.cpp',
@@ -77,6 +78,9 @@
 
     '../bench/SkBenchLogger.h',
     '../bench/SkBenchLogger.cpp',
+
+    '../src/gpu/utils/GrUtils.h',
+    '../src/gpu/utils/GrUtils.cpp',
   ],
 }