Added tree structure to GrGLFragmentProcessor, i.e. GL instances

src/gpu/gl/GrGLFragmentProcessor.cpp

Index: src/gpu/gl/GrGLFragmentProcessor.cpp
diff --git a/src/gpu/gl/GrGLFragmentProcessor.cpp b/src/gpu/gl/GrGLFragmentProcessor.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..d300da19f0b5eb2ca70d4b7a8665319e729f9902
--- /dev/null
+++ b/src/gpu/gl/GrGLFragmentProcessor.cpp
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrGLFragmentProcessor.h"
+#include "GrFragmentProcessor.h"
+
+void GrGLFragmentProcessor::setData(const GrGLProgramDataManager& pdman,
+                                    const GrFragmentProcessor& processor) {
+    this->onSetData(pdman, processor);
+    SkASSERT(fChildProcessors.count() == processor.numChildProcessors());
+    for (int i = 0; i < fChildProcessors.count(); ++i) {
+        fChildProcessors[i]->setData(pdman, processor.childProcessor(i));
+    }
+}