ensure depot_tools and cipd can bootstrap on all windows paths

On windows paths with spaces some cipd and depot_tools bootstrap commands were failing due to misquoting or syntax that didn't support such paths.  This ensures that a clean bootstrap on a path such as "C:/Foo Bar/depot_tools" works as expected.

Change-Id: Ib516d16ed7809635369399f3df0eff2269ff6e2b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3834965Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Josip Sokcevic <sokcevic@google.com>

bootstrap/win_tools.bat

@@ -33,7 +33,7 @@ if not exist "%BOOTSTRAP_ROOT_DIR%\.bleeding_edge" (
 :: This method requires EnableDelayedExpansion, and extracts the Python version
 :: from our CIPD manifest. Variables referenced using "!" instead of "%" are
 :: delayed expansion variables.
-for /F "tokens=*" %%A in (%~dp0%CIPD_MANIFEST%) do (
+for /F "usebackq tokens=*" %%A in ("%~dp0%CIPD_MANIFEST%") do (
   set LINE=%%A
   if not "x!LINE:cpython/=!" == "x!LINE!" set PYTHON_VERSION=!LINE:*version:=!
   if not "x!LINE:cpython3/=!" == "x!LINE!" set PYTHON3_VERSION=!LINE:*version:=!

cipd.bat

@@ -6,10 +6,10 @@
 setlocal
 
 set CIPD_BACKEND=https://chrome-infra-packages.appspot.com
-set VERSION_FILE="%~dp0cipd_client_version"
-set CIPD_BINARY="%~dp0.cipd_client.exe"
+set VERSION_FILE=%~dp0cipd_client_version
+set CIPD_BINARY=%~dp0.cipd_client.exe
 
-if not exist %CIPD_BINARY% (
+if not exist "%CIPD_BINARY%" (
   call :CLEAN_BOOTSTRAP
   goto :EXEC_CIPD
 )
@@ -46,9 +46,9 @@ exit /b %EXPORT_ERRORLEVEL%
 :: and unzipping the depot_tools.zip distribution, we clear the Zone.Identifier
 :: alternate data stream. This is equivalent to clicking the "Unblock" button
 :: in the file's properties dialog.
-echo.>%~dp0.cipd_impl.ps1:Zone.Identifier
+echo.>"%~dp0.cipd_impl.ps1:Zone.Identifier"
 powershell -NoProfile -ExecutionPolicy RemoteSigned ^
-    -Command "%~dp0.cipd_impl.ps1" ^
+    -File "%~dp0.cipd_impl.ps1" ^
     -CipdBinary "%CIPD_BINARY%" ^
     -BackendURL "%CIPD_BACKEND%" ^
     -VersionFile "%VERSION_FILE%" ^