Create GLSLUniformHandler class for gpu backend

src/gpu/effects/GrCustomXfermode.cpp

Index: src/gpu/effects/GrCustomXfermode.cpp
diff --git a/src/gpu/effects/GrCustomXfermode.cpp b/src/gpu/effects/GrCustomXfermode.cpp
index d2aff6042c28463b94bdc319e089bec13b744228..04ff4a746ba733692ddab05ebb012f94ee341afb 100644
--- a/src/gpu/effects/GrCustomXfermode.cpp
+++ b/src/gpu/effects/GrCustomXfermode.cpp
@@ -20,8 +20,8 @@
 #include "glsl/GrGLSLCaps.h"
 #include "glsl/GrGLSLFragmentProcessor.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
-#include "glsl/GrGLSLProgramBuilder.h"
 #include "glsl/GrGLSLProgramDataManager.h"
+#include "glsl/GrGLSLUniformHandler.h"
 #include "glsl/GrGLSLXferProcessor.h"
 
 bool GrCustomXfermode::IsSupportedMode(SkXfermode::Mode mode) {
@@ -158,8 +158,8 @@ private:
         }
     }
 
-    void emitBlendCodeForDstRead(GrGLSLXPBuilder* pb,
-                                 GrGLSLXPFragmentBuilder* fragBuilder,
+    void emitBlendCodeForDstRead(GrGLSLXPFragmentBuilder* fragBuilder,
+                                 GrGLSLUniformHandler* uniformHandler,
                                  const char* srcColor,
                                  const char* srcCoverage,
                                  const char* dstColor,