clang-format: [JS] support goog.requireType.

[mprobst]

Summary

It's a new primitive for importing symbols, and should be treated like
the (previously handled) goog.require and goog.forwardDeclare.

lib/Format/TokenAnnotator.cpp

private:
   bool isClosureImportStatement(const FormatToken &Tok) {
     // FIXME: Closure-library specific stuff should not be hard-coded but be
     // configurable.
     return Tok.TokenText == "goog" && Tok.Next && Tok.Next->is(tok::period) &&
            Tok.Next->Next &&
            (Tok.Next->Next->TokenText == "module" ||
             Tok.Next->Next->TokenText == "provide" ||
             Tok.Next->Next->TokenText == "require" ||
+            Tok.Next->Next->TokenText == "requireType" ||
             Tok.Next->Next->TokenText == "forwardDeclare") &&
            Tok.Next->Next->Next && Tok.Next->Next->Next->is(tok::l_paren);
   }
 
   void resetTokenMetadata(FormatToken *Token) {
     if (!Token)
       return;
 

unittests/Format/FormatTestJS.cpp

TEST_F(FormatTestJS, GoogModules) {
   verifyFormat("goog.module('this.is.really.absurdly.long');",
                getGoogleJSStyleWithColumns(40));
   verifyFormat("goog.require('this.is.really.absurdly.long');",
                getGoogleJSStyleWithColumns(40));
   verifyFormat("goog.provide('this.is.really.absurdly.long');",
                getGoogleJSStyleWithColumns(40));
   verifyFormat("var long = goog.require('this.is.really.absurdly.long');",
                getGoogleJSStyleWithColumns(40));
+  verifyFormat("const X = goog.requireType('this.is.really.absurdly.long');",
+               getGoogleJSStyleWithColumns(40));
   verifyFormat("goog.forwardDeclare('this.is.really.absurdly.long');",
                getGoogleJSStyleWithColumns(40));
 
   // These should be wrapped normally.
   verifyFormat(
       "var MyLongClassName =\n"
       "    goog.module.get('my.long.module.name.followedBy.MyLongClassName');");
   verifyFormat("function a() {\n"