[wasm] Move decoding constants out of wasm-module.h and into module-decoder.h

src/wasm/module-decoder.cc

Index: src/wasm/module-decoder.cc
diff --git a/src/wasm/module-decoder.cc b/src/wasm/module-decoder.cc
index e0b3bba1e1aecef26ff973feb4b71f5c7c68536a..ee211ad57e2fff003dae3f398150e33979104903 100644
--- a/src/wasm/module-decoder.cc
+++ b/src/wasm/module-decoder.cc
@@ -28,6 +28,39 @@ namespace wasm {
 #define TRACE(...)
 #endif
 
+const char* SectionName(WasmSectionCode code) {
+  switch (code) {
+    case kUnknownSectionCode:
+      return "Unknown";
+    case kTypeSectionCode:
+      return "Type";
+    case kImportSectionCode:
+      return "Import";
+    case kFunctionSectionCode:
+      return "Function";
+    case kTableSectionCode:
+      return "Table";
+    case kMemorySectionCode:
+      return "Memory";
+    case kGlobalSectionCode:
+      return "Global";
+    case kExportSectionCode:
+      return "Export";
+    case kStartSectionCode:
+      return "Start";
+    case kCodeSectionCode:
+      return "Code";
+    case kElementSectionCode:
+      return "Element";
+    case kDataSectionCode:
+      return "Data";
+    case kNameSectionCode:
+      return "Name";
+    default:
+      return "<unknown>";
+  }
+}
+
 namespace {
 
 const char* kNameString = "name";