Add onMemoryDump to GrContext

src/gpu/gl/GrGLTextureRenderTarget.h

Index: src/gpu/gl/GrGLTextureRenderTarget.h
diff --git a/src/gpu/gl/GrGLTextureRenderTarget.h b/src/gpu/gl/GrGLTextureRenderTarget.h
index a9134995fa8e936dc3d22be1b11c3b4412402fae..02db8bc08634994fec3842dbd449cb9f75e64f8e 100644
--- a/src/gpu/gl/GrGLTextureRenderTarget.h
+++ b/src/gpu/gl/GrGLTextureRenderTarget.h
@@ -9,6 +9,7 @@
 #ifndef GrGLTextureRenderTarget_DEFINED
 #define GrGLTextureRenderTarget_DEFINED
 
+#include "GrGLGpu.h"
 #include "GrGLTexture.h"
 #include "GrGLRenderTarget.h"
 
@@ -34,6 +35,8 @@ public:
         this->registerWithCache();
     }
 
+    void dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) const override;
+
 protected:
     void onAbandon() override {
         GrGLRenderTarget::onAbandon();