Bug 1355577 - Make the pointer in WrByteSlice const on the C++ side to match the Rust side. r=jrmuizel

MozReview-Commit-ID: FWCzZt8RAMj

gfx/webrender_bindings/Moz2DImageRenderer.cpp

@@ -11,10 +11,10 @@
 namespace mozilla {
 namespace wr {
 
-static bool Moz2DRenderCallback(const Range<uint8_t> aBlob,
+static bool Moz2DRenderCallback(const Range<const uint8_t> aBlob,
                                 gfx::IntSize aSize,
                                 gfx::SurfaceFormat aFormat,
-                                Range<uint8_t> output)
+                                Range<const uint8_t> output)
 {
   return false; // TODO(nical)
 }

gfx/webrender_bindings/WebRenderTypes.h

@@ -488,8 +488,8 @@ inline WrByteSlice RangeToByteSlice(mozilla::Range<uint8_t> aRange) {
   return WrByteSlice { aRange.begin().get(), aRange.length() };
 }
 
-inline mozilla::Range<uint8_t> ByteSliceToRange(WrByteSlice aWrSlice) {
-  return mozilla::Range<uint8_t>(aWrSlice.buffer, aWrSlice.len);
+inline mozilla::Range<const uint8_t> ByteSliceToRange(WrByteSlice aWrSlice) {
+  return mozilla::Range<const uint8_t>(aWrSlice.buffer, aWrSlice.len);
 }
 
 struct BuiltDisplayList {

gfx/webrender_bindings/webrender_ffi.h

@@ -66,7 +66,7 @@ WR_DECL_FFI_2(WrFontKey, uint32_t, uint32_t)
 // view of a buffer of bytes.
 // The canonical gecko equivalent is mozilla::Range<uint8_t>.
 struct WrByteSlice {
-  uint8_t* buffer;
+  const uint8_t* buffer;
   size_t len;
 };