Revert "Update mojo sdk to rev 8d45c89c30b230843c5bd6dd0693a555750946c0"

third_party/mojo/src/mojo/public/go/bindings/decoder.go

Index: third_party/mojo/src/mojo/public/go/bindings/decoder.go
diff --git a/third_party/mojo/src/mojo/public/go/bindings/decoder.go b/third_party/mojo/src/mojo/public/go/bindings/decoder.go
index 3f3cce9bca824f4f4378e12053dbb7809c0699dc..2dccd0ad99230ee81f32ee533d341d189c95a1ba 100644
--- a/third_party/mojo/src/mojo/public/go/bindings/decoder.go
+++ b/third_party/mojo/src/mojo/public/go/bindings/decoder.go
@@ -185,7 +185,6 @@ func (d *Decoder) ReadUint8() (uint8, error) {
 	if err := ensureElementBitSizeAndCapacity(d.state(), 8); err != nil {
 		return 0, err
 	}
-	d.state().alignOffsetToBytes()
 	value := d.buf[d.state().offset]
 	d.state().skipBytes(1)
 	d.state().elementsProcessed++
@@ -203,7 +202,6 @@ func (d *Decoder) ReadUint16() (uint16, error) {
 	if err := ensureElementBitSizeAndCapacity(d.state(), 16); err != nil {
 		return 0, err
 	}
-	d.state().alignOffsetToBytes()
 	d.state().offset = align(d.state().offset, 2)
 	value := binary.LittleEndian.Uint16(d.buf[d.state().offset:])
 	d.state().skipBytes(2)
@@ -222,7 +220,6 @@ func (d *Decoder) ReadUint32() (uint32, error) {
 	if err := ensureElementBitSizeAndCapacity(d.state(), 32); err != nil {
 		return 0, err
 	}
-	d.state().alignOffsetToBytes()
 	d.state().offset = align(d.state().offset, 4)
 	value := binary.LittleEndian.Uint32(d.buf[d.state().offset:])
 	d.state().skipBytes(4)
@@ -241,7 +238,6 @@ func (d *Decoder) ReadUint64() (uint64, error) {
 	if err := ensureElementBitSizeAndCapacity(d.state(), 64); err != nil {
 		return 0, err
 	}
-	d.state().alignOffsetToBytes()
 	d.state().offset = align(d.state().offset, 8)
 	value := binary.LittleEndian.Uint64(d.buf[d.state().offset:])
 	d.state().skipBytes(8)
@@ -304,59 +300,16 @@ func (d *Decoder) ReadPointer() (uint64, error) {
 	if newEnd%8 != 0 {
 		return 0, fmt.Errorf("incorrect pointer data alignment: %d", newEnd)
 	}
-	d.claimData(int(newEnd) - d.end)
+	d.claimData(d.end - int(newEnd))
 	return pointer, nil
 }
 
-// ReadUntypedHandle reads an untyped handle.
-func (d *Decoder) ReadUntypedHandle() (system.UntypedHandle, error) {
-	handleIndex, err := d.ReadUint32()
-	if err != nil {
-		return nil, err
-	}
-	if handleIndex == ^uint32(0) {
-		return &InvalidHandle{}, nil
-	}
-	return d.claimHandle(int(handleIndex))
-}
-
-// ReadHandle reads a handle.
-func (d *Decoder) ReadHandle() (system.Handle, error) {
-	return d.ReadUntypedHandle()
-}
-
 // ReadMessagePipeHandle reads a message pipe handle.
 func (d *Decoder) ReadMessagePipeHandle() (system.MessagePipeHandle, error) {
-	if handle, err := d.ReadUntypedHandle(); err != nil {
-		return nil, err
-	} else {
-		return handle.ToMessagePipeHandle(), nil
-	}
-}
-
-// ReadConsumerHandle reads a data pipe consumer handle.
-func (d *Decoder) ReadConsumerHandle() (system.ConsumerHandle, error) {
-	if handle, err := d.ReadUntypedHandle(); err != nil {
-		return nil, err
-	} else {
-		return handle.ToConsumerHandle(), nil
-	}
-}
-
-// ReadProducerHandle reads a data pipe producer handle.
-func (d *Decoder) ReadProducerHandle() (system.ProducerHandle, error) {
-	if handle, err := d.ReadUntypedHandle(); err != nil {
-		return nil, err
-	} else {
-		return handle.ToProducerHandle(), nil
-	}
-}
-
-// ReadSharedBufferHandle reads a shared buffer handle.
-func (d *Decoder) ReadSharedBufferHandle() (system.SharedBufferHandle, error) {
-	if handle, err := d.ReadUntypedHandle(); err != nil {
+	handleIndex, err := d.ReadUint32()
+	if err != nil {
 		return nil, err
-	} else {
-		return handle.ToSharedBufferHandle(), nil
 	}
+	untypedHandle, err := d.claimHandle(int(handleIndex))
+	return untypedHandle.ToMessagePipeHandle(), err
 }