Split GrFragmentProcessor into its own header

Review URL: https://codereview.chromium.org/660573002
diff --git a/src/effects/SkTableColorFilter.cpp b/src/effects/SkTableColorFilter.cpp
index b630e8b..1da6c55 100644
--- a/src/effects/SkTableColorFilter.cpp
+++ b/src/effects/SkTableColorFilter.cpp
@@ -275,7 +275,7 @@
 
 #if SK_SUPPORT_GPU
 
-#include "GrProcessor.h"
+#include "GrFragmentProcessor.h"
 #include "GrTBackendProcessorFactory.h"
 #include "gl/GrGLProcessor.h"
 #include "gl/builders/GrGLProgramBuilder.h"