Add Gpu Tracing to Ganesh

src/gpu/GrTraceMarker.h

Index: src/gpu/GrTraceMarker.h
diff --git a/src/gpu/GrTraceMarker.h b/src/gpu/GrTraceMarker.h
new file mode 100644
index 0000000000000000000000000000000000000000..38e87fd0fb5bd9776d67dcfaeddeb7551b44198c
--- /dev/null
+++ b/src/gpu/GrTraceMarker.h
@@ -0,0 +1,69 @@
+
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkTDArray.h"
+
+#ifndef GrTraceMarkerSet_DEFINED
+#define GrTraceMarkerSet_DEFINED
+
+class GrGpuTraceMarker {
+public:
+    GrGpuTraceMarker() {};
+    GrGpuTraceMarker(const char* marker, int idCounter) : fMarker(marker), fID(idCounter) {}
+
+    bool operator<(const GrGpuTraceMarker& rhs) const {
+        return this->fMarker < rhs.fMarker || (this->fMarker == rhs.fMarker && this->fID < rhs.fID);
+    }
+
+    bool operator==(const GrGpuTraceMarker& rhs) const {
+        return (this->fID == rhs.fID && this->fMarker == rhs.fMarker);
+    }
+
+    const char* fMarker;
+    int fID;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class SkString;
+
+class GrTraceMarkerSet {
+public:
+    GrTraceMarkerSet() {}
+
+    GrTraceMarkerSet(const GrTraceMarkerSet& other);
+
+    // Adds marker to the set.
+    void add(const GrGpuTraceMarker& marker); 
+    // Adds all markers from one set into this set.
+    void addSet(const GrTraceMarkerSet& markerSet);
+
+    void remove(const GrGpuTraceMarker& marker);
+
+    int count() const;
+
+    /**
+     * First sorts fMarkerArray and returns a string of the format
+     * MarkerName1(#,#,...)%MarkerName2(#,#,...):... where MarkerName is the
+     * marker string used in the TraceMarker and the (#,#,..) is a list of instance
+     * id's for the the given marker string
+     */
+    SkString toString() const; 
+
+    class Iter;
+
+    Iter begin() const;
+
+    Iter end() const;
+
+private:
+    mutable SkTDArray<GrGpuTraceMarker> fMarkerArray;
+};
+
+#endif
+