patch_manager_unittest: rename variables to be more meaningful

BUG=chromium:1042953

TEST=verified locally.

Change-Id: I1a452c2756491e69121a161a32ab007c4e79629d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2006728
Reviewed-by: George Burgess <gbiv@chromium.org>
Tested-by: Jian Cai <jiancai@google.com>
diff --git a/llvm_tools/patch_manager_unittest.py b/llvm_tools/patch_manager_unittest.py
index 688c2fe..62947ed 100755
--- a/llvm_tools/patch_manager_unittest.py
+++ b/llvm_tools/patch_manager_unittest.py
@@ -463,7 +463,7 @@
     # Simulate behavior for 'ApplyPatch()' when applying multiple applicable
     # patches.
     @CallCountsToMockFunctions
-    def MultipleCallsToApplyPatches(call_count, _, path_to_patch):
+    def MultipleCallsToApplyPatches(call_count, _src_path, path_to_patch):
       if call_count < 3:
         self.assertEqual(
             path_to_patch,
@@ -569,7 +569,7 @@
     # Simulate behavior for 'ApplyPatch()' when applying multiple applicable
     # patches.
     @CallCountsToMockFunctions
-    def MultipleCallsToApplyPatches(call_count, _, path_to_patch):
+    def MultipleCallsToApplyPatches(call_count, _src_path, path_to_patch):
       if call_count < 3:
         self.assertEqual(
             path_to_patch,