Bitmap.asImage()

... and lots and lots of IWYU

Change-Id: Ie5157dcdd2e6d29b95c71b39153278ab48ef4eb3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/346778
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/tools/gpu/ManagedBackendTexture.cpp b/tools/gpu/ManagedBackendTexture.cpp
index 691ca2e..061ad89 100644
--- a/tools/gpu/ManagedBackendTexture.cpp
+++ b/tools/gpu/ManagedBackendTexture.cpp
@@ -7,6 +7,7 @@
 
 #include "tools/gpu/ManagedBackendTexture.h"
 
+#include "include/core/SkBitmap.h"
 #include "include/core/SkImageInfo.h"
 #include "include/private/GrTypesPriv.h"
 #include "src/core/SkMipmap.h"