Add onMemoryDump to GrContext

src/gpu/GrResourceCache.h

Index: src/gpu/GrResourceCache.h
diff --git a/src/gpu/GrResourceCache.h b/src/gpu/GrResourceCache.h
index 2171420a43f696fcde1c7dce1c9a7a6be157fbd8..a7e71c5f073edc37e4a664979f79c45493aa98de 100644
--- a/src/gpu/GrResourceCache.h
+++ b/src/gpu/GrResourceCache.h
@@ -22,6 +22,7 @@
 
 class GrCaps;
 class SkString;
+class SkTraceMemoryDump;
 
 /**
  * Manages the lifetime of all GrGpuResource instances.
@@ -188,6 +189,9 @@ public:
     // This function is for unit testing and is only defined in test tools.
     void changeTimestamp(uint32_t newTimestamp);
 
+    // Enumerates all cached resources and dumps their details to traceMemoryDump.
+    void onMemoryDump(SkTraceMemoryDump* traceMemoryDump) const;
+
 private:
     ///////////////////////////////////////////////////////////////////////////
     /// @name Methods accessible via ResourceAccess