[wasm] Implement correct 2-level namespace for imports.

test/mjsunit/wasm/errors.js

 // Copyright 2016 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.
 
 // Flags: --expose-wasm
 
 'use strict';
 
 load("test/mjsunit/wasm/wasm-constants.js");
 load("test/mjsunit/wasm/wasm-module-builder.js");
@@ skipping 53 matching lines @@
   assertCompileError(builder().addFunction("f", kSig_v_v).addBody([
     kExprGetLocal, 0
   ]).end().toBuffer());
   assertCompileError(builder().addStart(0).toBuffer());
 })();
 
 (function TestLinkingError() {
   let b;
 
   b = builder();
-  b.addImportWithModule("foo", "bar", kSig_v_v);
+  b.addImport("foo", "bar", kSig_v_v);
   assertTypeError(b.toBuffer(), {});
   b = builder();
-  b.addImportWithModule("foo", "bar", kSig_v_v);
+  b.addImport("foo", "bar", kSig_v_v);
   assertLinkError(b.toBuffer(), {foo: {}});
   b = builder();
-  b.addImportWithModule("foo", "bar", kSig_v_v);
+  b.addImport("foo", "bar", kSig_v_v);
   assertLinkError(b.toBuffer(), {foo: {bar: 9}});
 
   b = builder();
   b.addImportedGlobal("foo", "bar", kAstI32);
   assertTypeError(b.toBuffer(), {});
   b = builder();
   b.addImportedGlobal("foo", "bar", kAstI32);
   assertLinkError(b.toBuffer(), {foo: {}});
   b = builder();
   b.addImportedGlobal("foo", "bar", kAstI32);
@@ skipping 34 matching lines @@
 
   assertRuntimeError(builder().addFunction("run", kSig_v_v).addBody([
   ]).exportFunc().end().
   addFunction("start", kSig_v_v).addBody([
     kExprUnreachable
   ]).end().addStart(1).toBuffer());
 })();
 
 (function TestConversionError() {
   let b = builder();
-  b.addImportWithModule("foo", "bar", kSig_v_l);
+  b.addImport("foo", "bar", kSig_v_l);
   assertConversionError(b.addFunction("run", kSig_v_v).addBody([
     kExprI64Const, 0, kExprCallFunction, 0
   ]).exportFunc().end().toBuffer());
 
   assertConversionError(builder().addFunction("run", kSig_l_v).addBody([
     kExprI64Const, 0
   ]).exportFunc().end().toBuffer());
 })();