Make pdf_xml_fuzzer available in non-XFA builds.

It fuzzes PDFium's core/fxcrt/xml code, which is in non-XFA builds.

Change-Id: I95e53ca24f4a6e298d88315dbb8e013cf6d7e06f
Reviewed-on: https://chromium-review.googlesource.com/c/1286429Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600464}

pdf/pdfium/fuzzers/BUILD.gn

@@ -27,6 +27,7 @@ group("pdf_fuzzers") {
     ":pdf_jpx_fuzzer",
     ":pdf_psengine_fuzzer",
     ":pdf_streamparser_fuzzer",
+    ":pdf_xml_fuzzer",
     ":pdfium_fuzzer",
   ]
   if (pdf_enable_xfa) {
@@ -37,7 +38,6 @@ group("pdf_fuzzers") {
       ":pdf_css_fuzzer",
       ":pdf_fm2js_fuzzer",
       ":pdf_formcalc_fuzzer",
-      ":pdf_xml_fuzzer",
       ":pdfium_xfa_fuzzer",
     ]
     if (pdf_enable_xfa_bmp) {
@@ -146,6 +146,14 @@ fuzzer_test("pdf_streamparser_fuzzer") {
   ]
 }
 
+fuzzer_test("pdf_xml_fuzzer") {
+  sources = []
+  deps = [
+    "//third_party/pdfium/testing/fuzzers:pdf_xml_fuzzer_src",
+  ]
+  dict = "dicts/pdf_xml.dict"
+}
+
 if (pdf_enable_xfa) {
   if (pdf_enable_xfa_bmp) {
     fuzzer_test("pdf_codec_bmp_fuzzer") {
@@ -237,14 +245,6 @@ if (pdf_enable_xfa) {
     }
   }
 
-  fuzzer_test("pdf_xml_fuzzer") {
-    sources = []
-    deps = [
-      "//third_party/pdfium/testing/fuzzers:pdf_xml_fuzzer_src",
-    ]
-    dict = "dicts/pdf_xml.dict"
-  }
-
   fuzzer_test("pdf_bidi_fuzzer") {
     sources = []
     deps = [