Allow gpu debug markers to be placed by using a GrContext

src/gpu/GrTracing.h

Index: src/gpu/GrTracing.h
diff --git a/src/gpu/GrTracing.h b/src/gpu/GrTracing.h
index cfce039b6ce28cdef83954a121c3ba91d20c52ef..311042f27b50659f6f7ca1152741aae1b38e6786 100644
--- a/src/gpu/GrTracing.h
+++ b/src/gpu/GrTracing.h
@@ -9,6 +9,8 @@
 #define GrTracing_DEFINED
 
 #include "GrDrawTarget.h"
+#include "GrGpu.h"
+#include "GrInOrderDrawBuffer.h"
 #include "GrTraceMarker.h"
 #include "SkTraceEvent.h"
 
@@ -37,6 +39,28 @@ private:
     SkTLazy<GrGpuTraceMarker> fTraceMarker;
 };
 
+class GrGpuTraceMarkerGeneratorContext : public ::SkNoncopyable {
+public:
+    GrGpuTraceMarkerGeneratorContext(GrContext* context) : fContext(context) {}
+
+    ~GrGpuTraceMarkerGeneratorContext() {
+        if (fTraceMarker.isValid()) {
+            fContext->removeGpuTraceMarker(fTraceMarker.get());
+        }
+    }
+
+    void initialize(const char* marker_str, int* marker_counter) {
+        GrGpuTraceMarker* traceMarker = fTraceMarker.init();
+        traceMarker->fMarker = marker_str;
+        traceMarker->fID = *marker_counter;
+        fContext->addGpuTraceMarker(traceMarker);
+    }
+
+private:
+    GrContext* fContext;
+    SkTLazy<GrGpuTraceMarker> fTraceMarker;
+};
+
 /**
  * GR_CREATE_TRACE_MARKER will place begin and end trace markers for both
  * cpu and gpu (if gpu tracing enabled) for the current scope.
@@ -48,12 +72,12 @@ private:
     INTERNAL_GR_CREATE_TRACE_MARKER(SK_MACRO_APPEND_LINE(static_name),    \
                                     SK_MACRO_APPEND_LINE(name_counter),   \
                                     target)                               \
+    sk_atomic_inc(&SK_MACRO_APPEND_LINE(name_counter));                   \
 
 #define INTERNAL_GR_CREATE_TRACE_MARKER(name, name_counter, target)       \
     GR_CREATE_GPU_TRACE_MARKER(name, name_counter, target)                \
     TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("skia.gpu"),name,              \
                  "id", name_counter)                                      \
-    sk_atomic_inc(&name_counter);                                         \
 
 #define GR_CREATE_GPU_TRACE_MARKER(name, name_counter, target)            \
     GrGpuTraceMarkerGenerator SK_MACRO_APPEND_LINE(TMG)(target);          \
@@ -61,5 +85,24 @@ private:
         SK_MACRO_APPEND_LINE(TMG).initialize(name, &name_counter);        \
     }                                                                     \
 
+#define GR_CREATE_TRACE_MARKER_CONTEXT(name, context)                     \
+    static const char* SK_MACRO_APPEND_LINE(static_name) = name;          \
+    static int SK_MACRO_APPEND_LINE(name_counter) = 0;                    \
+    INTERNAL_GR_CREATE_TRACE_MARKER_C(SK_MACRO_APPEND_LINE(static_name),  \
+                                    SK_MACRO_APPEND_LINE(name_counter),   \
+                                    context)                              \
+    sk_atomic_inc(&SK_MACRO_APPEND_LINE(name_counter));                   \
+
+#define INTERNAL_GR_CREATE_TRACE_MARKER_C(name, name_counter, context)    \
+    GR_CREATE_GPU_TRACE_MARKER_C(name, name_counter, context)             \
+    TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("skia.gpu"),name,              \
+                 "id", name_counter)                                      \
+
+#define GR_CREATE_GPU_TRACE_MARKER_C(name, name_counter, context)         \
+    GrGpuTraceMarkerGeneratorContext SK_MACRO_APPEND_LINE(TMG)(context);  \
+    if (context->isGpuTracingEnabled()) {                                 \
+        SK_MACRO_APPEND_LINE(TMG).initialize(name, &name_counter);        \
+    }                                                                     \
+
 
 #endif