Make unittests work in component build

src/wasm/module-decoder.h

Index: src/wasm/module-decoder.h
diff --git a/src/wasm/module-decoder.h b/src/wasm/module-decoder.h
index faaba1251f8d8d1d11d5637152b6cec92d7ec473..274b896135116de4721200a5d6421ba2ecae35e2 100644
--- a/src/wasm/module-decoder.h
+++ b/src/wasm/module-decoder.h
@@ -5,6 +5,7 @@
 #ifndef V8_WASM_MODULE_DECODER_H_
 #define V8_WASM_MODULE_DECODER_H_
 
+#include "src/globals.h"
 #include "src/wasm/ast-decoder.h"
 #include "src/wasm/wasm-module.h"
 #include "src/wasm/wasm-result.h"
@@ -29,14 +30,16 @@ V8_EXPORT_PRIVATE ModuleResult DecodeWasmModule(Isolate* isolate, Zone* zone,
 
 // Exposed for testing. Decodes a single function signature, allocating it
 // in the given zone. Returns {nullptr} upon failure.
-FunctionSig* DecodeWasmSignatureForTesting(Zone* zone, const byte* start,
-                                           const byte* end);
+V8_EXPORT_PRIVATE FunctionSig* DecodeWasmSignatureForTesting(Zone* zone,
+                                                             const byte* start,
+                                                             const byte* end);
 
 // Decodes the bytes of a WASM function between
 // {function_start} and {function_end}.
-FunctionResult DecodeWasmFunction(Isolate* isolate, Zone* zone, ModuleEnv* env,
-                                  const byte* function_start,
-                                  const byte* function_end);
+V8_EXPORT_PRIVATE FunctionResult DecodeWasmFunction(Isolate* isolate,
+                                                    Zone* zone, ModuleEnv* env,
+                                                    const byte* function_start,
+                                                    const byte* function_end);
 
 // Extracts the function offset table from the wasm module bytes.
 // Returns a vector with <offset, length> entries, or failure if the wasm bytes
@@ -45,7 +48,8 @@ FunctionOffsetsResult DecodeWasmFunctionOffsets(
     const byte* module_start, const byte* module_end,
     uint32_t num_imported_functions);
 
-WasmInitExpr DecodeWasmInitExprForTesting(const byte* start, const byte* end);
+V8_EXPORT_PRIVATE WasmInitExpr DecodeWasmInitExprForTesting(const byte* start,
+                                                            const byte* end);
 
 // Extracts the mapping from wasm byte offset to asm.js source position per
 // function.