Temporarily disable incremental_javac for Robolectric.

third_party/robolectric/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/rules.gni")
 
 java_prebuilt("tagsoup-1.2") {
   testonly = true
   jar_path = "lib/tagsoup-1.2.jar"
 }
@@ skipping 552 matching lines @@
 
     inputs = _template_files
     outputs = _processed_template_files
 
     deps = [
       ":robolectric_template_processor",
     ]
   }
 
   java_library(target_name) {
+    # TODO(mikecase): Remove this once crbug.com/638875 is fixed.
+    enable_incremental_javac_override = false
+
     testonly = true
     processors_javac =
         [ "org.robolectric.annotation.processing.RobolectricProcessor" ]
     processor_args_javac = [ "org.robolectric.annotation.processing.shadowPackage=org.robolectric" ]
     provider_configurations = [
       "robolectric/robolectric-shadows/resources/META-INF/services/org.robolectric.internal.ShadowProvider",
       "robolectric/robolectric-shadows/shadows-core/src/main/resources/META-INF/services/org.robolectric.ShadowsAdapter",
     ]
     if (host_os == "linux") {
       additional_jar_files = [
@@ skipping 59 matching lines @@
   deps = [
     ":android-all-5.0.0_r2-robolectric-1",
     ":robolectric_annotations_java",
     ":robolectric_processor_java",
     ":robolectric_utils_java",
     "//build/android:sun_tools_java",
     "//third_party/android_tools:android_support_multidex_java",
     "//third_party/guava:guava_java",
   ]
 }