refactor: apply some 'clang-tidy -fix' changes (#20172)

* refactor: fix clang-tidy vector operation warnings

Fix vector population performance-inefficient-vector-operation warnings
generated by clang-tidy

* refactor: fix clang-tidy emplace_back warnings

In cases where a temporary is created to be passed
to push_back(), replace it with emplace_back().

Warning: modernize-use-emplace

* refactor: fix clang-tidy loop iteration warnings

When practical, use range-based for loops instead of C-style for loops.

clang-tiny check: modernize-loop-convert

* refactor: fix clang-tidy string initialize warning

Remove redundant empty string initialization.

clang-tidy check: readability-redundant-string-init

shell/browser/web_dialog_helper.cc

@@ -282,7 +282,7 @@ file_dialog::Filters GetFileTypesFromAcceptType(
   // Allow all files when extension is specified.
   filters.push_back(file_dialog::Filter());
   filters.back().first = "All Files";
-  filters.back().second.push_back("*");
+  filters.back().second.emplace_back("*");
 
   return filters;
 }