Fixing mismatched class/struct on fwd declarations.
diff --git a/iree/compiler/Conversion/CodegenUtils/GetNumWorkgroups.h b/iree/compiler/Conversion/CodegenUtils/GetNumWorkgroups.h
index e8cd9db..01e4b3d 100644
--- a/iree/compiler/Conversion/CodegenUtils/GetNumWorkgroups.h
+++ b/iree/compiler/Conversion/CodegenUtils/GetNumWorkgroups.h
@@ -28,7 +28,7 @@
 namespace mlir {
 class Location;
 class FuncOp;
-class LogicalResult;
+struct LogicalResult;
 class PatternRewriter;
 class ConversionPatternRewriter;
 class Value;
diff --git a/iree/compiler/Conversion/LinalgToSPIRV/KernelDispatchUtils.h b/iree/compiler/Conversion/LinalgToSPIRV/KernelDispatchUtils.h
index fe4c453..38b9718 100644
--- a/iree/compiler/Conversion/LinalgToSPIRV/KernelDispatchUtils.h
+++ b/iree/compiler/Conversion/LinalgToSPIRV/KernelDispatchUtils.h
@@ -32,7 +32,7 @@
 
 namespace mlir {
 class FuncOp;
-class LogicalResult;
+struct LogicalResult;
 class Operation;
 class PatternRewriter;
 class ShapedType;
diff --git a/iree/compiler/Conversion/LinalgToSPIRV/Utils.h b/iree/compiler/Conversion/LinalgToSPIRV/Utils.h
index 972e116..ddaecf3 100644
--- a/iree/compiler/Conversion/LinalgToSPIRV/Utils.h
+++ b/iree/compiler/Conversion/LinalgToSPIRV/Utils.h
@@ -29,7 +29,7 @@
 class SubViewOp;
 class OperationFolder;
 class OpBuilder;
-class LogicalResult;
+struct LogicalResult;
 
 namespace iree_compiler {