Chrome Version: 70.0.3505.0
OS: Win10

What steps will reproduce the problem?
(1) Use the following args.gn, non-Googler build tools (DEPOT_TOOLS_WIN_TOOLCHAIN=0):

is_component_build = true
is_debug = false
enable_nacl = false
target_cpu = "x64"
remove_webcore_debug_symbols = true
use_jumbo_build = true

(2) Build "chrome" build target


What is the expected result?
Chrome builds successfully.

What happens instead?

The following kind of error message is reported when compiling components/download/database/download_db.cc:

../..\components/download/database/download_db.h(23,12):  error: no template named 'unique_ptr' in namespace 'std'
      std::unique_ptr<std::vector<DownloadDBEntry>> entries)>;
      ~~~~~^
../../components/download/database/download_db.cc(26,23):  error: no matching member function for call to 'Run'
  std::move(callback).Run(true,
  ~~~~~~~~~~~~~~~~~~~~^~~
../..\base/callback.h(91,5):  note: candidate function not viable: no known conversion from 'unique_ptr<std::vector<download::DownloadDBEntry, std::allocator<download::DownloadDBEntry> > >' to 'int' for 2nd argument
  R Run(Args... args) && {
    ^
../..\base/callback.h(84,5):  note: candidate function not viable: no known conversion from 'unique_ptr<std::vector<download::DownloadDBEntry, std::allocator<download::DownloadDBEntry> > >' to 'int' for 2nd argument
  R Run(Args... args) const & {
    ^
2 errors generated.

This seems to be a regression from: https://chromium-review.googlesource.com/c/chromium/src/+/1147604

If I revert that patch, then the code compiles fine.