Fix parameter name comments using clang-tidy. NFC.

This patch applies clang-tidy's bugprone-argument-comment tool
to LLVM, clang and lld source trees. Here is how I created this
patch:

$ git clone https://github.com/llvm/llvm-project.git
$ cd llvm-project
$ mkdir build
$ cd build
$ cmake -GNinja -DCMAKE_BUILD_TYPE=Debug \
    -DLLVM_ENABLE_PROJECTS='clang;lld;clang-tools-extra' \
    -DCMAKE_EXPORT_COMPILE_COMMANDS=On -DLLVM_ENABLE_LLD=On \
    -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ../llvm
$ ninja
$ parallel clang-tidy -checks='-*,bugprone-argument-comment' \
    -config='{CheckOptions: [{key: StrictMode, value: 1}]}' -fix \
    ::: ../llvm/lib/**/*.{cpp,h} ../clang/lib/**/*.{cpp,h} ../lld/**/*.{cpp,h}

llvm-svn: 366177
diff --git a/clang/lib/Sema/SemaExprMember.cpp b/clang/lib/Sema/SemaExprMember.cpp
index 2431f96..c856e37 100644
--- a/clang/lib/Sema/SemaExprMember.cpp
+++ b/clang/lib/Sema/SemaExprMember.cpp
@@ -1106,7 +1106,7 @@
     SourceLocation Loc = R.getNameLoc();
     if (SS.getRange().isValid())
       Loc = SS.getRange().getBegin();
-    BaseExpr = BuildCXXThisExpr(Loc, BaseExprType, /*isImplicit=*/true);
+    BaseExpr = BuildCXXThisExpr(Loc, BaseExprType, /*IsImplicit=*/true);
   }
 
   // Check the use of this member.
@@ -1130,7 +1130,7 @@
 
   if (VarDecl *Var = dyn_cast<VarDecl>(MemberDecl)) {
     return BuildMemberExpr(BaseExpr, IsArrow, OpLoc, &SS, TemplateKWLoc, Var,
-                           FoundDecl, /*MultipleCandidates=*/false,
+                           FoundDecl, /*HadMultipleCandidates=*/false,
                            MemberNameInfo, Var->getType().getNonReferenceType(),
                            VK_LValue, OK_Ordinary);
   }
@@ -1147,14 +1147,14 @@
     }
 
     return BuildMemberExpr(BaseExpr, IsArrow, OpLoc, &SS, TemplateKWLoc,
-                           MemberFn, FoundDecl, /*MultipleCandidates=*/false,
+                           MemberFn, FoundDecl, /*HadMultipleCandidates=*/false,
                            MemberNameInfo, type, valueKind, OK_Ordinary);
   }
   assert(!isa<FunctionDecl>(MemberDecl) && "member function not C++ method?");
 
   if (EnumConstantDecl *Enum = dyn_cast<EnumConstantDecl>(MemberDecl)) {
     return BuildMemberExpr(BaseExpr, IsArrow, OpLoc, &SS, TemplateKWLoc, Enum,
-                           FoundDecl, /*MultipleCandidates=*/false,
+                           FoundDecl, /*HadMultipleCandidates=*/false,
                            MemberNameInfo, Enum->getType(), VK_RValue,
                            OK_Ordinary);
   }
@@ -1163,7 +1163,7 @@
             *this, VarTempl, TemplateArgs, MemberNameInfo, TemplateKWLoc))
       return BuildMemberExpr(
           BaseExpr, IsArrow, OpLoc, &SS, TemplateKWLoc, Var, FoundDecl,
-          /*MultipleCandidates=*/false, MemberNameInfo,
+          /*HadMultipleCandidates=*/false, MemberNameInfo,
           Var->getType().getNonReferenceType(), VK_LValue, OK_Ordinary);
     return ExprError();
   }
@@ -1822,7 +1822,7 @@
 
   return BuildMemberExpr(Base.get(), IsArrow, OpLoc, &SS,
                          /*TemplateKWLoc=*/SourceLocation(), Field, FoundDecl,
-                         /*MultipleCandidates=*/false, MemberNameInfo,
+                         /*HadMultipleCandidates=*/false, MemberNameInfo,
                          MemberType, VK, OK);
 }
 
@@ -1851,7 +1851,7 @@
     SourceLocation Loc = R.getNameLoc();
     if (SS.getRange().isValid())
       Loc = SS.getRange().getBegin();
-    baseExpr = BuildCXXThisExpr(loc, ThisTy, /*isImplicit=*/true);
+    baseExpr = BuildCXXThisExpr(loc, ThisTy, /*IsImplicit=*/true);
   }
 
   return BuildMemberReferenceExpr(baseExpr, ThisTy,