patch from issue 886233004 at patchset 40001 (http://crrev.com/886233004#ps40001)

... with changes proposed in the review.

BUG=skia:

Review URL: https://codereview.chromium.org/894013002
diff --git a/tools/render_pictures_main.cpp b/tools/render_pictures_main.cpp
index 91b6481..11c640f 100644
--- a/tools/render_pictures_main.cpp
+++ b/tools/render_pictures_main.cpp
@@ -486,9 +486,7 @@
 
 #if GR_GPU_STATS && SK_SUPPORT_GPU
     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());
+        renderer->getGrContext()->printGpuStats();
     }
 #endif