Fix leaks in unit tests of GrGLTextureInfos

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index a2d1fafb872ba110a57071dd7fbe556fbad57e6f..c5fa61bd99851d9b9e5a58d56d14f5a7c7f7573b 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -363,12 +363,18 @@ public:
 
     Stats* stats() { return &fStats; }
 
-    // creation and deletion of raw texture for testing
-    // only to be used in GPU-specific tests
+    /** Creates a texture directly in the backend API without wrapping it in a GrTexture. This is
+        only to be used for testing (particularly for testing the methods that import an externally
+        created texture into Skia. Must be matched with a call to deleteTestingOnlyTexture(). */
     virtual GrBackendObject createTestingOnlyBackendTexture(void* pixels, int w, int h,
                                                             GrPixelConfig config) const = 0;
-    virtual bool isTestingOnlyBackendTexture(GrBackendObject id) const = 0;
-    virtual void deleteTestingOnlyBackendTexture(GrBackendObject id) const = 0;
+    /** Check a handle represents an actual texture in the backend API that has not been freed. */
+    virtual bool isTestingOnlyBackendTexture(GrBackendObject) const = 0;
+    /** If ownership of the backend texture has been transferred pass true for abandonTexture. This
+        will do any necessary cleanup of the handle without freeing the texture in the backend
+        API. */
+    virtual void deleteTestingOnlyBackendTexture(GrBackendObject,
+                                                 bool abandonTexture = false) const = 0;
 
     // width and height may be larger than rt (if underlying API allows it).
     // Returns nullptr if compatible sb could not be created, otherwise the caller owns the ref on