Add support to dump font cache texture for debug purposes

R=robertphillips@google.com, bsalomon@google.com

Author: jvanverth@google.com

Review URL: https://codereview.chromium.org/25736002

git-svn-id: http://skia.googlecode.com/svn/trunk@11579 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tools/render_pictures_main.cpp b/tools/render_pictures_main.cpp
index bf82831..70bc221 100644
--- a/tools/render_pictures_main.cpp
+++ b/tools/render_pictures_main.cpp
@@ -440,8 +440,10 @@
 #if GR_CACHE_STATS
     if (renderer->isUsingGpuDevice()) {
         GrContext* ctx = renderer->getGrContext();
-
         ctx->printCacheStats();
+#ifdef SK_DEVELOPER
+        ctx->dumpFontCache();
+#endif
     }
 #endif
 #endif