Add onImageInfo call to SkImage_Base.

src/image/SkImage_Gpu.h

Index: src/image/SkImage_Gpu.h
diff --git a/src/image/SkImage_Gpu.h b/src/image/SkImage_Gpu.h
index 333a96386e2f9a81d2ea85f9f329b25169216bb9..612741ee7b7bc37c6f27a7a357d18464b59d3d8a 100644
--- a/src/image/SkImage_Gpu.h
+++ b/src/image/SkImage_Gpu.h
@@ -12,6 +12,7 @@
 #include "GrTexture.h"
 #include "GrGpuResourcePriv.h"
 #include "SkBitmap.h"
+#include "SkGr.h"
 #include "SkImage_Base.h"
 #include "SkImagePriv.h"
 #include "SkSurface.h"
@@ -25,6 +26,10 @@ public:
     SkImage_Gpu(int w, int h, uint32_t uniqueID, SkAlphaType, GrTexture*, SkBudgeted);
     ~SkImage_Gpu() override;
 
+    SkImageInfo onImageInfo() const override {
+        return GrMakeInfoFromTexture(fTexture, fTexture->width(), fTexture->height(), isOpaque());
+    }
+
     void applyBudgetDecision() const {
         if (SkBudgeted::kYes == fBudgeted) {
             fTexture->resourcePriv().makeBudgeted();