Compile specific parts of the Android build with -O2.

base/BUILD.gn

 # Copyright (c) 2013 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/ui.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
@@ skipping 890 matching lines @@
   }
 
   if (!use_glib) {
     sources -= [
       "message_loop/message_pump_glib.cc",
       "message_loop/message_pump_glib.h",
     ]
   }
 
   configs += [ "//build/config/compiler:wexit_time_destructors" ]
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:optimize" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
 }
 
 # This is the subset of files from base that should not be used with a dynamic
 # library. Note that this library cannot depend on base because base depends on
 # base_static.
 source_set("base_static") {
   sources = [
     "base_switches.cc",
     "base_switches.h",
     "win/pe_image.cc",
     "win/pe_image.h",
   ]
+
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:optimize" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
 }
 
 component("i18n") {
   output_name = "base_i18n"
   sources = [
     "i18n/base_i18n_export.h",
     "i18n/bidi_line_iterator.cc",
     "i18n/bidi_line_iterator.h",
     "i18n/break_iterator.cc",
     "i18n/break_iterator.h",
@@ skipping 28 matching lines @@
     "i18n/utf8_validator_tables.cc",
     "i18n/utf8_validator_tables.h",
   ]
   defines = [ "BASE_I18N_IMPLEMENTATION" ]
   configs += [ "//build/config/compiler:wexit_time_destructors" ]
   deps = [
     ":base",
     "//base/third_party/dynamic_annotations",
     "//third_party/icu",
   ]
+
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:optimize" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
 }
 
 source_set("prefs") {
   sources = [
     "prefs/base_prefs_export.h",
     "prefs/default_pref_store.cc",
     "prefs/default_pref_store.h",
     "prefs/json_pref_store.cc",
     "prefs/json_pref_store.h",
     "prefs/overlay_user_pref_store.cc",
@@ skipping 25 matching lines @@
     "prefs/scoped_user_pref_update.cc",
     "prefs/scoped_user_pref_update.h",
     "prefs/value_map_pref_store.cc",
     "prefs/value_map_pref_store.h",
     "prefs/writeable_pref_store.h",
   ]
 
   defines = [ "BASE_PREFS_IMPLEMENTATION" ]
 
   deps = [ ":base" ]
+
+  if (is_android && !is_debug) {
+    configs -= [ "//build/config/compiler:optimize" ]
+    configs += [ "//build/config/compiler:optimize_max" ]
+  }
 }
 
 source_set("prefs_test_support") {
   testonly = true
   sources = [
     "prefs/mock_pref_change_callback.cc",
     "prefs/mock_pref_change_callback.h",
     "prefs/pref_store_observer_mock.cc",
     "prefs/pref_store_observer_mock.h",
     "prefs/testing_pref_service.cc",
@@ skipping 425 matching lines @@
   # GYP: //base.gyp:base_unittests_apk
   unittest_apk("base_unittests_apk") {
     deps = [
       ":base_java",
       ":base_java_unittest_support",
       ":base_unittests",
     ]
     unittests_dep = ":base_unittests"
   }
 }