Reland of Use visual studio toolchain from depot_tools for PDFium compilation (patchset #1 id:1 of https://codereview.chromium.org/1922373003/ )

Reason for revert:
I fixed Clang build config, and updated drm binary. Should work this time.

Original issue's description:
> Revert of Use visual studio toolchain from depot_tools for PDFium compilation (patchset #3 id:40001 of https://codereview.chromium.org/1897523002/ )
>
> Reason for revert:
> Clang build is broken. drm build has some problem. Will revert this change for now.
>
> Original issue's description:
> > Use visual studio toolchain from depot_tools for PDFium compilation
> >
> > Change to use visual studio toolchain from depot_tools by default.
> > Setting DEPOT_TOOLS_WIN_TOOLCHAIN=0 allows compilation using system
> > toolchain as before.
> >
> > Using toolchain from depot_tools unifies the compilation
> > environment, and brings the benefits of automated update, bug fixes
> > etc.
> >
> > Committed: https://pdfium.googlesource.com/pdfium/+/590f2d9e057a0d5b17a9706affd3c6115265021b
>
> TBR=brucedawson@chromium.org,thestig@chromium.org,tsepez@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://pdfium.googlesource.com/pdfium/+/df96690d4e3799536b981e3673d64018fa5fd037

TBR=brucedawson@chromium.org,thestig@chromium.org,tsepez@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/1927373002

1 files changed, 15 insertions, 2 deletions

diff --git a/build_gyp/gyp_pdfium b/build_gyp/gyp_pdfium
index c79593b990..23b1c719c2 100755
--- a/build_gyp/gyp_pdfium
+++ b/build_gyp/gyp_pdfium
@@ -13,13 +13,23 @@ import sys
 
 script_dir = os.path.dirname(os.path.realpath(__file__))
 pdfium_root = os.path.abspath(os.path.join(script_dir, os.pardir))
+output_rel_dir = 'out'
 
 sys.path.insert(0, os.path.join(pdfium_root, 'tools', 'gyp', 'pylib'))
 import gyp
-
+# vs_toolchain needs to be after gyp path setting since it also uses gyp.
+import vs_toolchain
 
 def run_gyp(args):
   rc = gyp.main(args)
+
+  # Copy Windows toolchain DLLs.
+  vs_runtime_dll_dirs = vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()
+  if vs_runtime_dll_dirs:
+    x64_runtime, x86_runtime = vs_runtime_dll_dirs
+    vs_toolchain.CopyVsRuntimeDlls(
+      os.path.join(pdfium_root, output_rel_dir), (x86_runtime, x64_runtime))
+
   if rc != 0:
     print 'Error running GYP'
     sys.exit(rc)
@@ -36,7 +46,7 @@ def main():
   args.append('-I')
   args.append(os.path.join(pdfium_root, 'build_gyp', 'standalone.gypi'))
 
-  args.extend(['-D', 'gyp_output_dir=out'])
+  args.extend(['-D', 'gyp_output_dir=' + output_rel_dir])
 
   # Set the GYP DEPTH variable to the root of the PDFium project.
   args.append('--depth=' + os.path.relpath(pdfium_root))
@@ -46,6 +56,9 @@ def main():
     print 'GYP_GENERATORS is not set, defaulting to ninja'
     os.environ['GYP_GENERATORS'] = 'ninja'
 
+  # Set up the environment variables.
+  vs_toolchain.SetEnvironmentAndGetRuntimeDllDirs()
+
   print 'Updating projects from gyp files...'
   sys.stdout.flush()