Switch default to the MangleNamer.

This Cl updates all of the generators and the inspector to use the
mangle namer by default.

Change-Id: Id6811d76bf2475a2c2a2864fb8fc0f43e95a6e65
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/36944
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

src/inspector/inspector.cc

@@ -48,7 +48,7 @@ Inspector::Inspector(ast::Module& module, Namer* namer)
 
 Inspector::Inspector(ast::Module& module)
     : module_(module),
-      namer_(new UnsafeNamer(&module)),
+      namer_(new MangleNamer(&module)),
       namer_is_owned_(true) {}
 
 Inspector::~Inspector() {

src/writer/hlsl/generator.cc

@@ -27,7 +27,7 @@ Generator::Generator(ast::Module module)
 
 Generator::Generator(ast::Module* module)
     : Text(module),
-      namer_(std::make_unique<UnsafeNamer>(module_)),
+      namer_(std::make_unique<MangleNamer>(module_)),
       impl_(std::make_unique<GeneratorImpl>(module_, namer_.get())) {}
 
 Generator::~Generator() = default;

src/writer/msl/generator.cc

@@ -27,7 +27,7 @@ Generator::Generator(ast::Module module)
 
 Generator::Generator(ast::Module* module)
     : Text(module),
-      namer_(std::make_unique<UnsafeNamer>(module_)),
+      namer_(std::make_unique<MangleNamer>(module_)),
       impl_(std::make_unique<GeneratorImpl>(module_, namer_.get())) {}
 
 Generator::~Generator() = default;

src/writer/spirv/generator.cc

@@ -28,7 +28,7 @@ Generator::Generator(ast::Module module)
 
 Generator::Generator(ast::Module* module)
     : writer::Writer(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>()) {}