Rename getResultType() on function and method declarations to getReturnType()

A return type is the declared or deduced part of the function type specified in
the declaration.

A result type is the (potentially adjusted) type of the value of an expression
that calls the function.

Rule of thumb:

  * Declarations have return types and parameters.
  * Expressions have result types and arguments.

llvm-svn: 200082
diff --git a/clang/lib/AST/CommentSema.cpp b/clang/lib/AST/CommentSema.cpp
index d324c5c..450325f 100644
--- a/clang/lib/AST/CommentSema.cpp
+++ b/clang/lib/AST/CommentSema.cpp
@@ -559,7 +559,7 @@
   if (!Traits.getCommandInfo(Command->getCommandID())->IsReturnsCommand)
     return;
   if (isFunctionDecl()) {
-    if (ThisDeclInfo->ResultType->isVoidType()) {
+    if (ThisDeclInfo->ReturnType->isVoidType()) {
       unsigned DiagKind;
       switch (ThisDeclInfo->CommentDecl->getKind()) {
       default: