Sample for GPU memory dumping using new SkTraceMemoryDump.

include/gpu/GrGpuResource.h

Index: include/gpu/GrGpuResource.h
diff --git a/include/gpu/GrGpuResource.h b/include/gpu/GrGpuResource.h
index d726115a7289127e1fd18dcee5810a984774fb8b..77df7d7a79b0e1e882339a29c5dc002ca2f046ec 100644
--- a/include/gpu/GrGpuResource.h
+++ b/include/gpu/GrGpuResource.h
@@ -15,6 +15,7 @@
 class GrContext;
 class GrGpu;
 class GrResourceCache;
+class SkTraceMemoryDump;
 
 /**
  * Base class for GrGpuResource. Handles the various types of refs we need. Separated out as a base
@@ -138,7 +139,7 @@ private:
  */
 class SK_API GrGpuResource : public GrIORef<GrGpuResource> {
 public:
-    
+
 
     enum LifeCycle {
         /**
@@ -252,6 +253,12 @@ public:
      */
     void abandon();
 
+    /**
+     * Dumps details about this GrGpuResource to the provided traceMemoryDump.
+     * May be overridden by subclasses to provide more detailed dumps.
+     **/
+    virtual void onMemoryDump(SkTraceMemoryDump* traceMemoryDump) const;
+
 protected:
     // This must be called by every GrGpuObject. It should be called once the object is fully
     // initialized (i.e. not in a base class constructor).