Remove remaining mentions of gflags

DEPS

 # This file contains dependencies for WebRTC.
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
   'webrtc_git': 'https://webrtc.googlesource.com',
   'chromium_revision': '300d540fe1c48277139e0461c291650cbe3b7a71',
   'boringssl_git': 'https://boringssl.googlesource.com',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.
@@ skipping 65 matching lines @@
     Var('chromium_git') + '/external/github.com/sctplab/usrsctp' + '@' + 'f4819e1b177f7bfdd761c147f5a649b9f1a78c06',
   'src/third_party/yasm/source/patched-yasm':
     Var('chromium_git') + '/chromium/deps/yasm/patched-yasm.git' + '@' + 'b98114e18d8b9b84586b10d24353ab8616d4c5fc',
   'src/tools':
     Var('chromium_git') + '/chromium/src/tools' + '@' + '4206aaf7d212896765f080d51257ae99ece512f2',
   'src/tools/gyp':
     Var('chromium_git') + '/external/gyp.git' + '@' + 'd61a9397e668fa9843c4aa7da9e79460fe590bfb',
   'src/tools/swarming_client':
     Var('chromium_git') + '/infra/luci/client-py.git' + '@' +  Var('swarming_revision'),
   # WebRTC-only dependencies (not present in Chromium).
-  'src/third_party/gflags':
-    Var('webrtc_git') + '/deps/third_party/gflags' + '@' + '892576179b45861b53e04a112996a738309cf364',
-  'src/third_party/gflags/src':
-    Var('chromium_git') + '/external/github.com/gflags/gflags' + '@' + '03bebcb065c83beff83d50ae025a55a4bf94dfca',
   'src/third_party/gtest-parallel':
     Var('chromium_git') + '/external/github.com/google/gtest-parallel' + '@' + 'ee2027381105650fb1c66b2b121ba00b79e84d5c',
 }
 deps_os = {
   'android': {
     'src/third_party/android_tools':
       Var('chromium_git') + '/android_tools.git' + '@' + 'aadb2fed04af8606545b0afe4e3060bc1a15fad7',
     'src/third_party/ced/src':
       Var('chromium_git') + '/external/github.com/google/compact_enc_det.git' + '@' + '94c367a1fe3a13207f4b22604fcfd1d9f9ddf6d9',
     'src/third_party/icu':
@@ skipping 443 matching lines @@
   'src/third_party/android_tools',
 ]
 
 # Define rules for which include paths are allowed in our source.
 include_rules = [
   # Base is only used to build Android APK tests and may not be referenced by
   # WebRTC production code.
   "-base",
   "-chromium",
   "+external/webrtc/webrtc",  # Android platform build.
-  "+gflags",
   "+libyuv",
   # Individual headers that will be moved out of here, see webrtc:4243.
   "+call/rtp_config.h",
   "+common_types.h",
   "+transport.h",
   "+typedefs.h",
 
   "+WebRTC",
   "+api",
   "+modules/include",
   "+rtc_base",
   "+test",
   "+rtc_tools",
 ]
 
 # The below rules will be removed when webrtc:4243 is fixed.
 specific_include_rules = {
   "video_receive_stream\.h": [
     "+call/video_receive_stream.h",
   ],
   "video_send_stream\.h": [
     "+call/video_send_stream.h",
   ],
 }