[clang] [clang-tools-extra] [clang][lex] Store non-owning options ref in `HeaderSearch` (PR #132780)

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git-clang-format --diff 72e596f35951e849de9fc739238e84ec1217b939 187c26f90800edf0b5335322025606e3779e344a --extensions cpp,h -- clang-tools-extra/clang-tidy/ExpandModularHeadersPPCallbacks.cpp clang-tools-extra/clang-tidy/ExpandModularHeadersPPCallbacks.h clang-tools-extra/clangd/ModulesBuilder.cpp clang-tools-extra/clangd/unittests/StdLibTests.cpp clang-tools-extra/modularize/ModularizeUtilities.cpp clang-tools-extra/modularize/ModularizeUtilities.h clang/include/clang/Frontend/ASTUnit.h clang/include/clang/Lex/HeaderSearch.h clang/lib/Frontend/ASTUnit.cpp clang/lib/Frontend/CompilerInstance.cpp clang/lib/Lex/HeaderSearch.cpp clang/unittests/Analysis/MacroExpansionContextTest.cpp clang/unittests/Basic/SourceManagerTest.cpp clang/unittests/Lex/HeaderSearchTest.cpp clang/unittests/Lex/LexerTest.cpp clang/unittests/Lex/ModuleDeclStateTest.cpp clang/unittests/Lex/PPCallbacksTest.cpp clang/unittests/Lex/PPConditionalDirectiveRecordTest.cpp clang/unittests/Lex/PPDependencyDirectivesTest.cpp clang/unittests/Lex/PPMemoryAllocationsTest.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index 0a5f1cfd1a..4bc0496253 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -832,11 +832,10 @@ std::unique_ptr<ASTUnit> ASTUnit::LoadFromASTFile(
   AST->ModCache = createCrossProcessModuleCache();
   AST->HSOpts = HSOpts ? HSOpts : std::make_shared<HeaderSearchOptions>();
   AST->HSOpts->ModuleFormat = std::string(PCHContainerRdr.getFormats().front());
-  AST->HeaderInfo.reset(new HeaderSearch(AST->getHeaderSearchOpts(),
-                                         AST->getSourceManager(),
-                                         AST->getDiagnostics(),
-                                         AST->getLangOpts(),
-                                         /*Target=*/nullptr));
+  AST->HeaderInfo.reset(
+      new HeaderSearch(AST->getHeaderSearchOpts(), AST->getSourceManager(),
+                       AST->getDiagnostics(), AST->getLangOpts(),
+                       /*Target=*/nullptr));
   AST->PPOpts = std::make_shared<PreprocessorOptions>();
 
   // Gather Info for preprocessor construction later on.

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https://github.com/llvm/llvm-project/pull/132780