Redact the word 'error' from messages shown in grit's output.
Redact the word 'error' from messages shown in grit's output.

This avoids issues with some build environments considering the tool
to have failed if it prints this text.

Patch by grt@chromium.org
Review URL: https://chromiumcodereview.appspot.com/10035030

git-svn-id: 50c90c531a9fd8f38831f054b7ea6b96f50d91dc@35 7262f16d-afe8-6277-6482-052fa10e57b1

Omegaphora/external_chromium_org_tools_grit,yinquan529/platform-external-chromium_org-tools-grit,geekboxzone/lollipop_external_chromium_org_tools_grit,android-ia/platform_external_chromium_org_tools_grit,Omegaphora/external_chromium_org_tools_grit,android-ia/platform_external_chromium_org_tools_grit,MIPS/external-chromium_org-tools-grit,bpsinc-native/src_tools_grit,bpsinc-native/src_tools_grit,AOSPU/external_chromium_org_tools_grit,yinquan529/platform-external-chromium_org-tools-grit,geekboxzone/lollipop_external_chromium_org_tools_grit,IllusionRom-deprecated/android_platform_external_chromium_org_tools_grit,xin3liang/platform_external_chromium_org_tools_grit