Add error message for using import() in a type annotation

Closes #3323

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=244704722

Author: zavr-1

src/com/google/javascript/jscomp/DiagnosticGroups.java

@@ -228,6 +228,7 @@ public static DiagnosticGroup forName(String name) {
           "nonStandardJsDocs",
           RhinoErrorReporter.BAD_JSDOC_ANNOTATION,
           RhinoErrorReporter.INVALID_PARAM,
+          RhinoErrorReporter.JSDOC_IMPORT_TYPE_WARNING,
           CheckJSDoc.JSDOC_IN_BLOCK_COMMENT);
 
   public static final DiagnosticGroup INVALID_CASTS =

src/com/google/javascript/jscomp/RhinoErrorReporter.java

@@ -48,6 +48,10 @@ class RhinoErrorReporter {
   static final DiagnosticType JSDOC_MISSING_TYPE_WARNING =
       DiagnosticType.disabled("JSC_JSDOC_MISSING_TYPE_WARNING", "{0}");
 
+  // Import is supported by VSCode and is pretty much a standard now.
+  static final DiagnosticType JSDOC_IMPORT_TYPE_WARNING =
+      DiagnosticType.disabled("JSC_JSDOC_IMPORT_TYPE_WARNING", "{0}");
+
   static final DiagnosticType TOO_MANY_TEMPLATE_PARAMS =
       DiagnosticType.disabled("JSC_TOO_MANY_TEMPLATE_PARAMS", "{0}");
 
@@ -153,6 +157,11 @@ private RhinoErrorReporter(AbstractCompiler compiler) {
             // Unresolved types that aren't forward declared.
             .put(Pattern.compile(".*Unknown type.*"), UNRECOGNIZED_TYPE_ERROR)
 
+            // Import annotation errors.
+            .put(
+                Pattern.compile("^Bad type annotation. Import in typedef.*"),
+                JSDOC_IMPORT_TYPE_WARNING)
+
             // Type annotation errors.
             .put(Pattern.compile("^Bad type annotation.*"), TYPE_PARSE_ERROR)
 

src/com/google/javascript/jscomp/parsing/JsDocInfoParser.java

@@ -1939,7 +1939,11 @@ private Node parseTypeExpressionAnnotation(JsDocToken token) {
       if (typeNode != null) {
         skipEOLs();
         if (!match(JsDocToken.RIGHT_CURLY)) {
-          reportTypeSyntaxWarning("msg.jsdoc.missing.rc");
+          if (typeNode.isString() && "import".equals(typeNode.getString())) {
+            reportTypeSyntaxWarning("msg.jsdoc.import");
+          } else {
+            reportTypeSyntaxWarning("msg.jsdoc.missing.rc");
+          }
         } else {
           next();
         }

src/com/google/javascript/jscomp/resources.json

@@ -351,3 +351,6 @@ msg.jsdoc.typetransformation.extra.param =\
 
 msg.jsdoc.typetransformation.invalid.inside =\
     Invalid expression inside {0}
+
+msg.jsdoc.import =\
+    Import in typedef is not supported.

src/com/google/javascript/rhino/Messages.properties

@@ -691,6 +691,13 @@ public void testMalformedThisAnnotation() {
         "Bad type annotation. type not recognized due to syntax error." + BAD_TYPE_WIKI_LINK);
   }
 
+  @Test
+  public void testParseImportTypeError() {
+    parse(
+        "@type {import('http').Stream} */",
+        "Bad type annotation. Import in typedef is not supported." + BAD_TYPE_WIKI_LINK);
+  }
+
   @Test
   public void testParseFunctionalTypeError1() {
     parse(