Fix ref cnt'ing issue in GrProgramElement.

include/gpu/GrProgramElement.h

Index: include/gpu/GrProgramElement.h
diff --git a/include/gpu/GrProgramElement.h b/include/gpu/GrProgramElement.h
index 245dcd5fbca582bd689ba27688e9aa45534513de..2cdd1cc5635014e81d3362b4fb8ca3a0600abca7 100644
--- a/include/gpu/GrProgramElement.h
+++ b/include/gpu/GrProgramElement.h
@@ -44,8 +44,12 @@ public:
     void unref() const {
         this->validate();
         --fRefCnt;
-        if (0 == fRefCnt && 0 == fPendingExecutions) {
-            SkDELETE(this);
+        if (0 == fRefCnt) {
+            if (0 == fPendingExecutions) {
+                SkDELETE(this);
+            } else {
+                this->removeRefs();
+            }
         }
     }
 
@@ -80,6 +84,8 @@ private:
 
     void completedExecution() const;
 
+    void removeRefs() const;
+
     mutable int32_t fRefCnt;
     // Count of deferred executions not yet issued to the 3D API.
     mutable int32_t fPendingExecutions;