Revert of Don't flush on read/write pixels unless necessary

include/gpu/GrGpuResource.h

Index: include/gpu/GrGpuResource.h
diff --git a/include/gpu/GrGpuResource.h b/include/gpu/GrGpuResource.h
index 61849e7232fd9f23df1219429d7355580a2606ef..f20bad3e9f57580ba416711a337bac071aada82c 100644
--- a/include/gpu/GrGpuResource.h
+++ b/include/gpu/GrGpuResource.h
@@ -80,13 +80,8 @@
 #endif
     }
 
-
 protected:
     GrIORef() : fRefCnt(1), fPendingReads(0), fPendingWrites(0) {}
-
-    bool internalHasPendingRead() const { return SkToBool(fPendingReads); }
-    bool internalHasPendingWrite() const { return SkToBool(fPendingWrites); }
-    bool internalHasPendingIO() const { return SkToBool(fPendingWrites | fPendingReads); }
 
 private:
     void addPendingRead() const {