Add method to GrProgramResource to record that pending a execution was completed.

src/gpu/GrProgramElement.cpp

Index: src/gpu/GrProgramElement.cpp
diff --git a/src/gpu/GrProgramElement.cpp b/src/gpu/GrProgramElement.cpp
index e14a85b5f4c763f46a09470dd810ff06b4d6f921..70d5339e902e81a5baf5d8a84dd1af96824dc507 100644
--- a/src/gpu/GrProgramElement.cpp
+++ b/src/gpu/GrProgramElement.cpp
@@ -5,7 +5,6 @@
  * found in the LICENSE file.
  */
 
-
 #include "GrProgramElement.h"
 #include "GrProgramResource.h"
 
@@ -28,3 +27,20 @@ void GrProgramElement::convertRefToPendingExecution() const {
         }
     }
 }
+
+void GrProgramElement::completedExecution() const {
+    this->validate();
+    --fPendingExecutions;
+    if (0 == fPendingExecutions) {
+        if (0 == fRefCnt) {
+            SkDELETE(this);
+        } else {
+            // Now our pending executions have ocurred and we still have refs. Convert
+            // ownership of our resources back to regular refs.
+            for (int i = 0; i < fProgramResources.count(); ++i) {
+                fProgramResources[i]->pendingIOComplete();
+            }
+
+        }
+    }
+}