Add --skip_cpu and --skip_gpu options to tests

tests/Test.h

Index: tests/Test.h
diff --git a/tests/Test.h b/tests/Test.h
index 2dc7c66f7c2e2833eb2639b26989a73f06be93e0..935568c6f45e6fa00a47dd08ce05be4974132699 100644
--- a/tests/Test.h
+++ b/tests/Test.h
@@ -66,6 +66,8 @@ namespace skiatest {
 
         virtual bool isThreadsafe() const { return true; }
 
+        virtual bool isGPUTest() const { return false; }

[mtklein, 2014/01/27 22:35:29]

Can you fold isThreadsafe and this together?  isThreadSafe() = !isGpuTest()
universally right now.  I like your name better.

[borenet, 2014/01/28 18:42:09]

Done.

+
     protected:
         virtual void onGetName(SkString*) = 0;
         virtual void onRun(Reporter*) = 0;
@@ -83,6 +85,7 @@ namespace skiatest {
         static GrContextFactory* GetGrContextFactory();
         static void DestroyContexts();
         virtual bool isThreadsafe() const { return false; }
+        virtual bool isGPUTest() const { return true; }
     private:
     };