Reduce verbosity of SkGraphics::Init in default case.

SkGraphics::Init() now checks to see if there are any non-default
runtime configuration options before announcing that it is about
to print out the non-default runtime configuration options.

This makes the executables in tools/ less verbose.

Add SkRTConfRegistry::countNonDefault() function.

BUG=
R=mtklein@google.com, reed@google.com

Review URL: https://codereview.chromium.org/133583003

git-svn-id: http://skia.googlecode.com/svn/trunk@13017 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/utils/SkRTConf.h b/include/utils/SkRTConf.h
index 4d7cda2..37e3259 100644
--- a/include/utils/SkRTConf.h
+++ b/include/utils/SkRTConf.h
@@ -75,6 +75,7 @@
 public:
     SkRTConfRegistry();
     void printAll(const char *fname = NULL) const;
+    bool hasNonDefault() const;
     void printNonDefault(const char *fname = NULL) const;
     const char *configFileLocation() const;
     void possiblyDumpFile() const;