Use StringRef in Pass/PassManager APIs (NFC)

llvm-svn: 283004
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp
index 1a83793..0c64641 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyReplacePhysRegs.cpp
@@ -39,7 +39,7 @@
   WebAssemblyReplacePhysRegs() : MachineFunctionPass(ID) {}
 
 private:
-  const char *getPassName() const override {
+  StringRef getPassName() const override {
     return "WebAssembly Replace Physical Registers";
   }