Add checks for non-inclusive words in PRESUBMIT.py:ChecksCommon()

pdfium runs the checks with Tricium via pdfium_analysis.
- https://source.chromium.org/chromium/infra/infra_superproject/+/main:build/recipes/recipes/pdfium_analysis.py;l=60

However, Tricium is going to be deprecated by EOY 2024.
This CL adds the equivalent checks to the PRESUBMIT.py
so that the Tricium analyzer can be removed from pdfium_analysis.
- https://source.chromium.org/chromium/chromium/tools/depot_tools/+/main:presubmit_canned_checks.py;l=2518-2536;drc=0bc7c4832e4f2d453e4826c9a2e1197e11bd6ec7

Change-Id: I7d60c8b68dd54effd452c44735e471f2638b1c36
Bug: 369701326
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/124870
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 58cc45e..ed1e99f 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -537,6 +537,8 @@
           project_name='PDFium',
           source_file_filter=lambda x: input_api.FilterSourceFile(
               x, files_to_check=files_to_check)))
+  results.extend(
+      input_api.canned_checks.CheckInclusiveLanguage(input_api, output_api))
 
   return results
 
diff --git a/infra/inclusive_language_presubmit_exempt_dirs.txt b/infra/inclusive_language_presubmit_exempt_dirs.txt
new file mode 100644
index 0000000..cb9e423
--- /dev/null
+++ b/infra/inclusive_language_presubmit_exempt_dirs.txt
@@ -0,0 +1,4 @@
+# List of directories exempt from the inclusive language checks in PRESUBMIT.py.
+#
+# Note: Subdirectories are NOT included in the exemption. Only files directly
+# within these directories will be skipped.