[wasm] Move the CallDescriptor creation methods out of ModuleEnv into the compiler.

src/compiler/wasm-compiler.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_WASM_COMPILER_H_
 #define V8_COMPILER_WASM_COMPILER_H_
 
 #include <memory>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
@@ skipping 393 matching lines @@
     if (buf != buffer) memcpy(buf, buffer, old_count * sizeof(Node*));
     return buf;
   }
 
   int AddParameterNodes(Node** args, int pos, int param_count,
                         wasm::FunctionSig* sig);
 
   void SetNeedsStackCheck() { needs_stack_check_ = true; }
 };
 
+V8_EXPORT_PRIVATE CallDescriptor* GetWasmCallDescriptor(Zone* zone,
+                                                        wasm::FunctionSig* sig);
+V8_EXPORT_PRIVATE CallDescriptor* GetI32WasmCallDescriptor(
+    Zone* zone, CallDescriptor* descriptor);
+V8_EXPORT_PRIVATE CallDescriptor* GetI32WasmCallDescriptorForSimd(
+    Zone* zone, CallDescriptor* descriptor);
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_WASM_COMPILER_H_