Make _incremental targets work with emma_coverage=true

build/secondary/third_party/android_tools/BUILD.gn

 # Copyright 2014 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")
 
 config("cpu_features_include") {
   include_dirs = [ "ndk/sources/android/cpufeatures" ]
 }
 
@@ skipping 18 matching lines @@
 
     # Must be after no_chromium_code for warning flags to be ordered correctly.
     ":cpu_features_warnings",
   ]
 }
 
 android_java_prebuilt("android_gcm_java") {
   jar_path = "$android_sdk_root/extras/google/gcm/gcm-client/dist/gcm.jar"
 }
 
+android_java_prebuilt("emma_device") {
+  jar_path = "$android_sdk_root/tools/lib/emma_device.jar"
+}
+
 android_java_prebuilt("uiautomator_java") {
   jar_path = "$android_sdk/uiautomator.jar"
 }
 
 android_java_prebuilt("android_support_annotations_javalib") {
   jar_path = "$android_sdk_root/extras/android/support/annotations/android-support-annotations.jar"
 }
 
 java_prebuilt("android_support_multidex_java") {
   supports_android = true
@@ skipping 66 matching lines @@
   ]
   proguard_preprocess = true
   proguard_config = "//third_party/android_tools/proguard.flags"
   jar_path = "$android_sdk_root/extras/google/google_play_services/libproject/google-play-services_lib/libs/google-play-services.jar"
 }
 
 # TODO(jbudorick): Remove this once net_java_test_support no longer needs it.
 android_java_prebuilt("legacy_http_javalib") {
   jar_path = "$android_sdk/optional/org.apache.http.legacy.jar"
 }