Update new entry points to use correct namer.

This CL fixes up a merge conflict which accidentally used the Unsafe
namer instead of the Mangle namer for the temporary API to allow rolling
into Chrome.

Change-Id: Id3b932d29fe15ab64347350f5b36b3d9efeffbdf
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/37300
Auto-Submit: dan sinclair <dsinclair@chromium.org>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Commit-Queue: dan sinclair <dsinclair@chromium.org>

src/writer/hlsl/generator.cc

@@ -22,7 +22,7 @@ namespace hlsl {
 
 Generator::Generator(ast::Module module)
     : Text(std::move(module)),
-      namer_(std::make_unique<UnsafeNamer>(module_)),
+      namer_(std::make_unique<MangleNamer>(module_)),
       impl_(std::make_unique<GeneratorImpl>(module_, namer_.get())) {}
 
 Generator::Generator(ast::Module* module)

src/writer/msl/generator.cc

@@ -22,7 +22,7 @@ namespace msl {
 
 Generator::Generator(ast::Module module)
     : Text(std::move(module)),
-      namer_(std::make_unique<UnsafeNamer>(module_)),
+      namer_(std::make_unique<MangleNamer>(module_)),
       impl_(std::make_unique<GeneratorImpl>(module_, namer_.get())) {}
 
 Generator::Generator(ast::Module* module)

src/writer/spirv/generator.cc

@@ -22,7 +22,7 @@ namespace spirv {
 
 Generator::Generator(ast::Module module)
     : writer::Writer(std::move(module)),
-      namer_(std::make_unique<UnsafeNamer>(module_)),
+      namer_(std::make_unique<MangleNamer>(module_)),
       builder_(std::make_unique<Builder>(module_, namer_.get())),
       writer_(std::make_unique<BinaryWriter>()) {}