Remove memory_pressure component.

components/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/chrome_build.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//printing/features/features.gni")
 import("//rlz/features/features.gni")
 import("//testing/test.gni")
@@ skipping 80 matching lines @@
     "//components/google/core/browser:unit_tests",
     "//components/grpc_support/test:unit_tests",
     "//components/history/core/browser:unit_tests",
     "//components/history/core/common:unit_tests",
     "//components/image_fetcher/core:unit_tests",
     "//components/json_schema:unit_tests",
     "//components/keyed_service/core:unit_tests",
     "//components/language_usage_metrics:unit_tests",
     "//components/leveldb_proto:unit_tests",
     "//components/login:unit_tests",
-    "//components/memory_pressure:unit_tests",
     "//components/metrics:unit_tests",
     "//components/mime_util:unit_tests",
     "//components/navigation_metrics:unit_tests",
     "//components/net_log:unit_tests",
     "//components/network_session_configurator:unit_tests",
     "//components/network_time:unit_tests",
     "//components/ntp_snippets:unit_tests",
     "//components/ntp_tiles:unit_tests",
     "//components/offline_items_collection/core:unit_tests",
     "//components/omnibox/browser:unit_tests",
@@ skipping 394 matching lines @@
       "//testing/perf",
       "//url",
     ]
 
     if (!is_ios) {
       sources += [ "discardable_memory/common/discardable_shared_memory_heap_perftest.cc" ]
       deps += [ "//components/discardable_memory/common" ]
     }
   }
 }