Add counting of some GL calls

tools/render_pictures_main.cpp

Index: tools/render_pictures_main.cpp
diff --git a/tools/render_pictures_main.cpp b/tools/render_pictures_main.cpp
index 4fb83521c8c3e05e6661463aaf2d9172430dcf78..d7a213cb47e74650db2885c7c75b96b3c04205a9 100644
--- a/tools/render_pictures_main.cpp
+++ b/tools/render_pictures_main.cpp
@@ -36,6 +36,10 @@ DEFINE_int32(maxComponentDiff, 256, "Maximum diff on a component, 0 - 256. Compo
              "Requires --validate.");
 DEFINE_string(mismatchPath, "", "Write images for tests that failed due to "
               "pixel mismatches into this directory.");
+#if GR_GPU_STATS
+DEFINE_bool(gpuStats, false, "Only meaningful with gpu configurations. "
+            "Report some GPU call statistics.");
+#endif
 DEFINE_bool(preprocess, false, "If true, perform device specific preprocessing before rendering.");
 DEFINE_string(readJsonSummaryPath, "", "JSON file to read image expectations from.");
 DECLARE_string(readPath);
@@ -496,6 +500,13 @@ int tool_main(int argc, char** argv) {
 #endif
     }
 #endif
+#if GR_GPU_STATS
+    if (FLAGS_gpuStats && renderer->isUsingGpuDevice()) {
+        GrContext* ctx = renderer->getGrContext();
+        SkDebugf("RenderTarget Binds: %d\n", ctx->gpuStats()->renderTargetBinds());
+        SkDebugf("Shader Compilations: %d\n", ctx->gpuStats()->shaderCompilations());
+    }
+#endif
 #endif
     if (FLAGS_writeJsonSummaryPath.count() == 1) {
         // If there were any descriptions on the command line, insert them now.