Update pdfium.py to support running pdfium tests with Dr. Memory

scripts/slave/recipes/pdfium.expected/drm_win_xfa.json

Index: scripts/slave/recipes/pdfium.expected/drm_win_xfa.json
diff --git a/scripts/slave/recipes/pdfium.expected/win_xfa.json b/scripts/slave/recipes/pdfium.expected/drm_win_xfa.json
similarity index 76%
copy from scripts/slave/recipes/pdfium.expected/win_xfa.json
copy to scripts/slave/recipes/pdfium.expected/drm_win_xfa.json
index 40faeedf45fa8603d7270eb1e74387c0251f76c2..2cc3f87c455ab1d72dc54d445db71e0e6ca18cf2 100644
--- a/scripts/slave/recipes/pdfium.expected/win_xfa.json
+++ b/scripts/slave/recipes/pdfium.expected/drm_win_xfa.json
@@ -60,14 +60,22 @@
   },
   {
     "cmd": [
-      "[SLAVE_BUILD]\\pdfium\\out\\Debug\\pdfium_unittests.exe"
+      "python",
+      "-u",
+      "[SLAVE_BUILD]\\pdfium\\tools\\drmemory\\scripts\\pdfium_tests.py"
+      "--test",
+      "pdfium_unittests"
     ],
     "cwd": "[SLAVE_BUILD]\\pdfium",
     "name": "unittests"
   },
   {
     "cmd": [
-      "[SLAVE_BUILD]\\pdfium\\out\\Debug\\pdfium_embeddertests.exe"
+      "python",
+      "-u",
+      "[SLAVE_BUILD]\\pdfium\\tools\\drmemory\\scripts\\pdfium_tests.py"
+      "--test",
+      "pdfium_embeddertests"
     ],
     "cwd": "[SLAVE_BUILD]\\pdfium",
     "name": "embeddertests"
@@ -76,7 +84,9 @@
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]\\pdfium\\testing\\tools\\run_javascript_tests.py"
+      "[SLAVE_BUILD]\\pdfium\\tools\\drmemory\\scripts\\pdfium_tests.py"
+      "--test",
+      "pdfium_javascript"
     ],
     "cwd": "[SLAVE_BUILD]\\pdfium",
     "name": "javascript tests"
@@ -85,7 +95,9 @@
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]\\pdfium\\testing\\tools\\run_pixel_tests.py"
+      "[SLAVE_BUILD]\\pdfium\\tools\\drmemory\\scripts\\pdfium_tests.py"
+      "--test",
+      "pdfium_pixel"
     ],
     "cwd": "[SLAVE_BUILD]\\pdfium",
     "name": "pixel tests"
@@ -94,7 +106,9 @@
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]\\pdfium\\testing\\tools\\run_corpus_tests.py"
+      "[SLAVE_BUILD]\\pdfium\\tools\\drmemory\\scripts\\pdfium_tests.py",
+      "--test",
+      "pdfium_corpus"
     ],
     "cwd": "[SLAVE_BUILD]\\pdfium",
     "name": "corpus tests"