[clang-format] Start formatting cpp code in raw strings in google style

[krasimir]

Summary

This adds some delimiters to detect cpp code in raw strings.

[klimek]

LG

lib/Format/Format.cpp

GoogleStyle.IncludeCategories = {
       {"^<ext/.*\\.h>", 2}, {"^<.*\\.h>", 1}, {"^<.*", 2}, {".*", 3}};
   GoogleStyle.IncludeIsMainRegex = "([-_](test|unittest))?$";
   GoogleStyle.IndentCaseLabels = true;
   GoogleStyle.KeepEmptyLinesAtTheStartOfBlocks = false;
   GoogleStyle.ObjCBinPackProtocolList = FormatStyle::BPS_Never;
   GoogleStyle.ObjCSpaceAfterProperty = false;
   GoogleStyle.ObjCSpaceBeforeProtocolList = true;
   GoogleStyle.PointerAlignment = FormatStyle::PAS_Left;
-  GoogleStyle.RawStringFormats = {{
+  GoogleStyle.RawStringFormats = {
+      {
+          FormatStyle::LK_Cpp,
+          /*Delimiters=*/
+          {
+              "cc",
+              "CC",
+              "cpp",
+              "Cpp",
+              "CPP",
+              "c++",
+              "C++",
+          },
+          /*EnclosingFunctionNames=*/
+          {},
+          /*CanonicalDelimiter=*/"",
+          /*BasedOnStyle=*/"google",
+      },
+      {
           FormatStyle::LK_TextProto,
           /*Delimiters=*/
           {
               "pb",
               "PB",
               "proto",
               "PROTO",
           },
           /*EnclosingFunctionNames=*/
           {},
           /*CanonicalDelimiter=*/"",
           /*BasedOnStyle=*/"google",
-  }};
+      },
+  };
   GoogleStyle.SpacesBeforeTrailingComments = 2;
   GoogleStyle.Standard = FormatStyle::LS_Auto;
 
   GoogleStyle.PenaltyReturnTypeOnItsOwnLine = 200;
   GoogleStyle.PenaltyBreakBeforeFirstCallParameter = 1;
 
   if (Language == FormatStyle::LK_Java) {
     GoogleStyle.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;