Replace instances of datadeps --> data_deps.

tools/android/forwarder2/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.
 
 # GYP: //tools/android/forwarder2/forwarder.gyp:forwarder2
 group("forwarder2") {
-  datadeps = [
+  data_deps = [
     ":host_forwarder($host_toolchain)",
     ":host_forwarder_copy($host_toolchain)",
     ":device_forwarder($default_toolchain)",
     ":device_forwarder_prepare_dist($default_toolchain)",
   ]
 }
 
 if (current_toolchain == default_toolchain) {
   import("//build/config/android/rules.gni")
 
@@ skipping 20 matching lines @@
       "self_deleter_helper.h",
       "socket.cc",
       "socket.h",
       "util.h",
     ]
     deps = [
       "//base",
       "//build/config/sanitizers:deps",
       "//tools/android/common",
     ]
-    datadeps = [
-      "//build/android/pylib/device/commands",
-    ]
+    data_deps = [ "//build/android/pylib/device/commands" ]
   }
 
   # GYP: //tools/android/forwarder2/forwarder.gyp:forwarder2
   create_native_executable_dist("device_forwarder_prepare_dist") {
     dist_dir = "$root_build_dir/forwarder_dist"
     binary = "$root_build_dir/device_forwarder"
     deps = [
       ":device_forwarder",
     ]
   }
@@ skipping 36 matching lines @@
       "$root_out_dir/host_forwarder",
     ]
     outputs = [
       "$root_build_dir/host_forwarder",
     ]
     deps = [
       ":host_forwarder",
     ]
   }
 }