[wasm] Adding feature to JIT a wasm function at runtime and hook up the compiled code into the indi…

src/wasm/wasm-module.h

Index: src/wasm/wasm-module.h
diff --git a/src/wasm/wasm-module.h b/src/wasm/wasm-module.h
index 00e76c49ff40acdbc1b226a4abcbc34aa59716ca..3c12461f90d0e1f338f4661e4627b2c73eedaf0a 100644
--- a/src/wasm/wasm-module.h
+++ b/src/wasm/wasm-module.h
@@ -190,7 +190,8 @@ struct WasmModule {
   // switch to libc-2.21 or higher.
   base::SmartPointer<base::Semaphore> pending_tasks;
 
-  WasmModule();
+  WasmModule() : WasmModule(nullptr) {}
+  explicit WasmModule(byte* module_start);
 
   // Get a string stored in the module bytes representing a name.
   WasmName GetName(uint32_t offset, uint32_t length) const {