Revert of clang/win: Fix a few warnings in targets not in chromium_builder_tests...

Revert of clang/win: Fix a few warnings in targets not in chromium_builder_tests. (patchset #3 id:40001 of https://codereview.chromium.org/526513002/)

Reason for revert:
Speculative, might have broken InstallerStateTest.InitializeTwice on XP: http://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%281%29/builds/32481

InstallerStateTest.InitializeTwice (run #1):
[ RUN      ] InstallerStateTest.InitializeTwice
c:\b\build\slave\win_builder\build\src\chrome\installer\util\installer_state_unittest.cc(639): error: Value of: wcsstr(installer_state.target_path().value().c_str(), BrowserDistribution::GetSpecificDistribution( BrowserDistribution::CHROME_BINARIES)-> GetInstallSubDir().c_str())
  Actual: false
Expected: true
[  FAILED  ] InstallerStateTest.InitializeTwice (219 ms)

InstallerStateTest.InitializeTwice (run #2):
[ RUN      ] InstallerStateTest.InitializeTwice
c:\b\build\slave\win_builder\build\src\chrome\installer\util\installer_state_unittest.cc(639): error: Value of: wcsstr(installer_state.target_path().value().c_str(), BrowserDistribution::GetSpecificDistribution( BrowserDistribution::CHROME_BINARIES)-> GetInstallSubDir().c_str())
  Actual: false
Expected: true
[  FAILED  ] InstallerStateTest.InitializeTwice (109 ms)

Original issue's description:
> clang/win: Fix a few warnings in targets not in chromium_builder_tests.
>
> Also don't use "default" as a variable name, as it's a keyword.
> Also fix a bug where a wstring was passed to %ls.
>
> No real behavior change.
>
> BUG=82385
> R=hans@chromium.org
> TBR=cpu, vitalybuka
>
> Committed to pending queue: https://chromium.googlesource.com/chromium/src/+/d7efa09

TBR=hans@chromium.org,robertshield@chromium.org,gab@chromium.org,vitalybuka@chromium.org,cpu@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=82385

Review URL: https://codereview.chromium.org/519463003

Cr-Commit-Position: refs/heads/master@{#292809}