[wasm] Refactor import handling for 0xC.

test/mjsunit/wasm/wasm-constants.js

Index: test/mjsunit/wasm/wasm-constants.js
diff --git a/test/mjsunit/wasm/wasm-constants.js b/test/mjsunit/wasm/wasm-constants.js
index 388e5f50152a3737b25d94bf4b4506ffe26a1d22..0e60fca1d2c666649450038aaa1afbd6c333e91c 100644
--- a/test/mjsunit/wasm/wasm-constants.js
+++ b/test/mjsunit/wasm/wasm-constants.js
@@ -89,8 +89,6 @@ var kExternalMemory = 2;
 var kExternalGlobal = 3;
 
 // Useful signatures
-var kSig_i = makeSig([], [kAstI32]);
-var kSig_d = makeSig([], [kAstF64]);
 var kSig_i_i = makeSig([kAstI32], [kAstI32]);
 var kSig_i_l = makeSig([kAstI64], [kAstI32]);
 var kSig_i_ii = makeSig([kAstI32, kAstI32], [kAstI32]);
@@ -100,6 +98,8 @@ var kSig_l_ll = makeSig([kAstI64, kAstI64], [kAstI64]);
 var kSig_i_dd = makeSig([kAstF64, kAstF64], [kAstI32]);
 var kSig_v_v = makeSig([], []);
 var kSig_i_v = makeSig([], [kAstI32]);
+var kSig_f_v = makeSig([], [kAstF64]);
+var kSig_d_v = makeSig([], [kAstF64]);
 var kSig_v_i = makeSig([kAstI32], []);
 var kSig_v_ii = makeSig([kAstI32, kAstI32], []);
 var kSig_v_iii = makeSig([kAstI32, kAstI32, kAstI32], []);