Generalize rebase-errors.py so it works for other files.

net/cert/internal/path_builder_unittest.cc

Index: net/cert/internal/path_builder_unittest.cc
diff --git a/net/cert/internal/path_builder_unittest.cc b/net/cert/internal/path_builder_unittest.cc
index 3e6391706a015e1e4184b4a65e316576c7986b27..5f0a2eb62348d5c64db87734cee6f22b67784b9c 100644
--- a/net/cert/internal/path_builder_unittest.cc
+++ b/net/cert/internal/path_builder_unittest.cc
@@ -497,18 +497,19 @@ class PathBuilderKeyRolloverTest : public ::testing::Test {
     bool unused_result;
     std::string unused_errors;
 
-    ReadVerifyCertChainTestFromFile("key-rollover-oldchain.pem", &path,
-                                    &oldroot_, &time_, &unused_result,
-                                    &unused_errors);
+    ReadVerifyCertChainTestFromFile(
+        "net/data/verify_certificate_chain_unittest/key-rollover-oldchain.pem",
+        &path, &oldroot_, &time_, &unused_result, &unused_errors);
     ASSERT_EQ(2U, path.size());
     target_ = path[0];
     oldintermediate_ = path[1];
     ASSERT_TRUE(target_);
     ASSERT_TRUE(oldintermediate_);
 
-    ReadVerifyCertChainTestFromFile("key-rollover-longrolloverchain.pem", &path,
-                                    &oldroot_, &time_, &unused_result,
-                                    &unused_errors);
+    ReadVerifyCertChainTestFromFile(
+        "net/data/verify_certificate_chain_unittest/"
+        "key-rollover-longrolloverchain.pem",
+        &path, &oldroot_, &time_, &unused_result, &unused_errors);
     ASSERT_EQ(4U, path.size());
     newintermediate_ = path[1];
     newroot_ = path[2];