Index: lib/Format/TokenAnnotator.cpp
===================================================================
--- lib/Format/TokenAnnotator.cpp
+++ lib/Format/TokenAnnotator.cpp
@@ -786,7 +786,8 @@
            Tok.Next->Next && (Tok.Next->Next->TokenText == "module" ||
                               Tok.Next->Next->TokenText == "provide" ||
                               Tok.Next->Next->TokenText == "require" ||
-                              Tok.Next->Next->TokenText == "setTestOnly") &&
+                              Tok.Next->Next->TokenText == "setTestOnly" ||
+                              Tok.Next->Next->TokenText == "forwardDeclare") &&
            Tok.Next->Next->Next && Tok.Next->Next->Next->is(tok::l_paren);
   }
 
Index: unittests/Format/FormatTestJS.cpp
===================================================================
--- unittests/Format/FormatTestJS.cpp
+++ unittests/Format/FormatTestJS.cpp
@@ -277,6 +277,8 @@
                getGoogleJSStyleWithColumns(40));
   verifyFormat("goog.setTestOnly('this.is.really.absurdly.long');",
                getGoogleJSStyleWithColumns(40));
+  verifyFormat("goog.forwardDeclare('this.is.really.absurdly.long');",
+               getGoogleJSStyleWithColumns(40));
 
   // These should be wrapped normally.
   verifyFormat(