[Mac/GN] Let //chrome/browser:browser be a static library.

chrome/browser/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/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
 import("//media/media_options.gni")
@@ skipping 64 matching lines @@
   # with additionally just coding the library name here.
   config("gnome_keyring_direct") {
     libs = [ "gnome-keyring" ]
   }
 }
 
 # Use a static library here because many test binaries depend on this but don't
 # require many files from it. This makes linking more efficient. However, on
 # Windows official builds the static library will be too large (> 32-bits) so
 # use source sets in that case.
-if (is_mac || (is_win && is_official_build)) {
-  # TODO(brettw) bug 618797: Remove the mac condition. On Mac making this
-  # target a static_library causes a crash on startup and the browser_tests all
-  # fail. My guess is this is due to a required static initializer not being
-  # brought in.
+if (is_win && is_official_build) {
   chrome_browser_target_type = "source_set"
 } else {
   chrome_browser_target_type = "static_library"
 }
 target(chrome_browser_target_type, "browser") {
   configs += [
     "//build/config/compiler:wexit_time_destructors",
     "//build/config:precompiled_headers",
     "//third_party/WebKit/public:debug_devtools",
   ]
@@ skipping 1274 matching lines @@
   # linking all of the test support.
   source_set("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }