Index: cfe/trunk/lib/Format/TokenAnnotator.cpp
===================================================================
--- cfe/trunk/lib/Format/TokenAnnotator.cpp
+++ cfe/trunk/lib/Format/TokenAnnotator.cpp
@@ -2717,7 +2717,8 @@
       return true;
   } else if (Style.Language == FormatStyle::LK_Cpp ||
              Style.Language == FormatStyle::LK_ObjC ||
-             Style.Language == FormatStyle::LK_Proto) {
+             Style.Language == FormatStyle::LK_Proto ||
+             Style.Language == FormatStyle::LK_TextProto) {
     if (Left.isStringLiteral() && Right.isStringLiteral())
       return true;
   }
Index: cfe/trunk/unittests/Format/FormatTestTextProto.cpp
===================================================================
--- cfe/trunk/unittests/Format/FormatTestTextProto.cpp
+++ cfe/trunk/unittests/Format/FormatTestTextProto.cpp
@@ -452,5 +452,11 @@
                "  >\n"
                ">");
 }
+
+TEST_F(FormatTestTextProto, BreaksConsecutiveStringLiterals) {
+  verifyFormat("ala: \"str1\"\n"
+               "     \"str2\"\n");
+}
+
 } // end namespace tooling
 } // end namespace clang