Add is_chromecast to GN build.

chrome/test/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/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/chrome_tests.gni")
@@ skipping 321 matching lines @@
       if (!is_mac) {
         sources += rebase_path(
                 chrome_tests_gypi_values.chrome_interactive_ui_test_views_non_mac_sources,
                 ".",
                 "//chrome")
       }
       if (is_linux) {
         # TODO(gbillock): aura linux does not support the automation for
         # SendMouseMoveNotifyWhenDone
         sources -= [ "../browser/ui/views/toolbar/toolbar_button_test.cc" ]
+
+        if (!is_chromeos) {
+          # Desktop linux.
+          sources -= [
+            # TODO(port): This times out. Attempts have been made to fix the
+            # individual failures, but each time I disable a test from these
+            # suites, it seems like one or another starts timing out too.
+            "../browser/ui/views/keyboard_access_browsertest.cc",
+          ]
+        }
       }
       if (is_chromeos || !use_x11) {
         sources -= [
           "../../ui/views/widget/desktop_aura/desktop_window_tree_host_x11_interactive_uitest.cc",
           "../../ui/views/widget/desktop_aura/x11_topmost_window_finder_interactive_uitest.cc",
         ]
       }
       if (use_aura) {
         deps += [ "//ui/touch_selection" ]
       }
     }
 
-    if (is_linux && !is_chromeos) {
-      # Desktop linux.
-      sources -= [
-        # TODO(port): This times out. Attempts have been made to fix the
-        # individual failures, but each time I disable a test from these
-        # suites, it seems like one or another starts timing out too.
-        "../browser/ui/views/keyboard_access_browsertest.cc",
-      ]
-    } else {
+    if (!is_desktop_linux) {
       # Everything but desktop Linux.
       sources += rebase_path(
               chrome_tests_gypi_values.chrome_interactive_ui_test_non_desktop_linux_sources,
               ".",
               "//chrome")
     }
 
     if (is_chromeos) {
       sources += rebase_path(
               chrome_tests_gypi_values.chrome_interactive_ui_test_chromeos_sources,
@@ skipping 618 matching lines @@
       sources -= [
         # On Windows and Linux, we currently don't support enough of the
         # ash environment to run these unit tests.
         #
         # TODO: enable these on windows and linux.
         "../browser/ui/ash/accelerator_commands_browsertest.cc",
         "../browser/ui/ash/accelerator_controller_browsertest.cc",
         "../browser/ui/ash/launcher/chrome_launcher_controller_browsertest.cc",
         "../browser/ui/ash/launcher/launcher_favicon_loader_browsertest.cc",
         "../browser/ui/ash/shelf_browsertest.cc",
-        "../browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc",
       ]
+
+      if (toolkit_views) {
+        sources -= [ "../browser/ui/views/frame/browser_non_client_frame_view_ash_browsertest.cc" ]
+      }
     }
     if (is_mac) {
       # TODO(mark): We really want this for all non-static library
       # targets, but when we tried to pull it up to the common.gypi
       # level, it broke other things like the ui and startup tests. *shrug*
       ldflags = [ "-Wl,-ObjC" ]
 
       # Other platforms only need
       # chrome_resources.gyp:{packed_extra_resources,packed_resources},
       # and can build this target standalone much faster.
@@ skipping 695 matching lines @@
               chrome_tests_unit_gypi_values.chrome_unit_tests_media_router_sources,
               ".",
               "//chrome")
       deps += [ "//chrome/browser/media/router:test_support" ]
       if (!is_android) {
         sources += rebase_path(
                 chrome_tests_unit_gypi_values.chrome_unit_tests_media_router_non_android_sources,
                 ".",
                 "//chrome")
       }
-      if (!toolkit_views) {
-        sources -= [ "../browser/ui/views/media_router/media_router_ui_browsertest.cc" ]
-      }
     }
     if (enable_webrtc) {
       sources += rebase_path(
               chrome_tests_unit_gypi_values.chrome_unit_tests_webrtc_sources,
               ".",
               "//chrome")
     }
     if (is_chromeos) {
       deps += [ "//chrome/browser/chromeos:unit_tests" ]
       sources -= [ "../browser/signin/signin_manager_unittest.cc" ]
@@ skipping 284 matching lines @@
     "//third_party/mojo/src/mojo/edk/system",
   ]
 
   if (!is_android && use_ash) {
     sources += rebase_path(
             chrome_tests_unit_gypi_values.chrome_test_support_unit_ash_sources,
             ".",
             "//chrome")
   }
 }