Remove deferred clear from SkGpuDevice

gm/imagefromyuvtextures.cpp

Index: gm/imagefromyuvtextures.cpp
diff --git a/gm/imagefromyuvtextures.cpp b/gm/imagefromyuvtextures.cpp
index 28d2cf84c56bd74d989d3ac7174d7fc88f69ef7d..c53df295cd0c6ba843347de382fbea49758524b2 100644
--- a/gm/imagefromyuvtextures.cpp
+++ b/gm/imagefromyuvtextures.cpp
@@ -94,7 +94,7 @@ protected:
     }
 
     void createYUVTextures(GrContext* context, GrBackendObject yuvHandles[3]) {
-        const GrGpu* gpu = context->getGpu();
+        GrGpu* gpu = context->getGpu();
         if (!gpu) {
             return;
         }
@@ -111,7 +111,7 @@ protected:
 
     void deleteYUVTextures(GrContext* context, const GrBackendObject yuvHandles[3]) {
 
-        const GrGpu* gpu = context->getGpu();
+        GrGpu* gpu = context->getGpu();
         if (!gpu) {
             return;
         }