[wasm] Implement {Compile,Runtime}Error; fix traps from start function

src/wasm/wasm-result.cc

Index: src/wasm/wasm-result.cc
diff --git a/src/wasm/wasm-result.cc b/src/wasm/wasm-result.cc
index 7d251f03dfc884f19df22ca731bf800b15718a22..6d535e3f576a87fa093d1af9a482ca39c9ed6772 100644
--- a/src/wasm/wasm-result.cc
+++ b/src/wasm/wasm-result.cc
@@ -46,28 +46,35 @@ void ErrorThrower::Format(i::Handle<i::JSFunction> constructor,
   exception_ = isolate_->factory()->NewError(constructor, message);
 }
 
-void ErrorThrower::Error(const char* format, ...) {
+void ErrorThrower::TypeError(const char* format, ...) {
   if (error()) return;
   va_list arguments;
   va_start(arguments, format);
-  Format(isolate_->error_function(), format, arguments);
+  Format(isolate_->type_error_function(), format, arguments);
   va_end(arguments);
 }
 
-void ErrorThrower::TypeError(const char* format, ...) {
+void ErrorThrower::RangeError(const char* format, ...) {
   if (error()) return;
   va_list arguments;
   va_start(arguments, format);
-  Format(isolate_->type_error_function(), format, arguments);
+  Format(isolate_->range_error_function(), format, arguments);
   va_end(arguments);
 }
 
-void ErrorThrower::RangeError(const char* format, ...) {
+void ErrorThrower::CompileError(const char* format, ...) {
   if (error()) return;
   va_list arguments;
   va_start(arguments, format);
-  CHECK(*isolate_->range_error_function() != *isolate_->type_error_function());
-  Format(isolate_->range_error_function(), format, arguments);
+  Format(isolate_->wasm_compile_error_function(), format, arguments);
+  va_end(arguments);
+}
+
+void ErrorThrower::RuntimeError(const char* format, ...) {
+  if (error()) return;
+  va_list arguments;
+  va_start(arguments, format);
+  Format(isolate_->wasm_runtime_error_function(), format, arguments);
   va_end(arguments);
 }