Fuchsia: miscellaneous fixes to make content_unittests buildable.

* Disable POSIX signalling from BrowserTestBase for Fuchsia
  (not compatible).
* Switch EXPECT_DEATH tests to EXPECT_DEATH_IF_SUPPORTED for
  TestBrowserThreadBundleTest.
* Add fuchsia to the list of supported platforms in
  fieldtrial_to_struct.py.
* Move webrtc deps into "enable_webrtc" conditional block.


Bug: 754861, 756269
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I2cce36ca3cebfeb0acf86ad0c2cf0cd0f8645f51
Reviewed-on: https://chromium-review.googlesource.com/619727
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Reviewed-by: Scott Graham <scottmg@chromium.org>
Reviewed-by: Nasko Oskov <nasko@chromium.org>
Reviewed-by: Alexei Svitkine (very slow) <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496498}

content/public/test/browser_test_base.cc

@@ -62,7 +62,7 @@
 namespace content {
 namespace {
 
-#if defined(OS_POSIX)
+#if defined(OS_POSIX) && !defined(OS_FUCHSIA)
 // On SIGSEGV or SIGTERM (sent by the runner on timeouts), dump a stack trace
 // (to make debugging easier) and also exit with a known error code (so that
 // the test framework considers this a failure -- http://crbug.com/57578).
@@ -81,7 +81,7 @@ void DumpStackTraceSignalHandler(int signal) {
   }
   _exit(128 + signal);
 }
-#endif  // defined(OS_POSIX)
+#endif  // defined(OS_POSIX) && !defined(OS_FUCHSIA)
 
 void RunTaskOnRendererThread(const base::Closure& task,
                              const base::Closure& quit_task) {
@@ -277,13 +277,13 @@ void BrowserTestBase::TearDown() {
 }
 
 void BrowserTestBase::ProxyRunTestOnMainThreadLoop() {
-#if defined(OS_POSIX)
+#if defined(OS_POSIX) && !defined(OS_FUCHSIA)
   g_browser_process_pid = base::GetCurrentProcId();
   signal(SIGSEGV, DumpStackTraceSignalHandler);
 
   if (handle_sigterm_)
     signal(SIGTERM, DumpStackTraceSignalHandler);
-#endif  // defined(OS_POSIX)
+#endif  // defined(OS_POSIX) && !defined(OS_FUCHSIA)
 
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kEnableTracing)) {

content/public/test/test_browser_thread_bundle_unittest.cc

@@ -44,7 +44,8 @@ TEST(TestBrowserThreadBundleTest,
 
 TEST(TestBrowserThreadBundleTest, MessageLoopTypeMismatch) {
   base::MessageLoopForUI message_loop;
-  EXPECT_DEATH(
+
+  EXPECT_DEATH_IF_SUPPORTED(
       {
         TestBrowserThreadBundle test_browser_thread_bundle(
             TestBrowserThreadBundle::IO_MAINLOOP);
@@ -53,7 +54,7 @@ TEST(TestBrowserThreadBundleTest, MessageLoopTypeMismatch) {
 }
 
 TEST(TestBrowserThreadBundleTest, MultipleTestBrowserThreadBundle) {
-  EXPECT_DEATH(
+  EXPECT_DEATH_IF_SUPPORTED(
       {
         TestBrowserThreadBundle test_browser_thread_bundle;
         TestBrowserThreadBundle other_test_browser_thread_bundle;

content/test/BUILD.gn

@@ -1629,7 +1629,6 @@ test("content_unittests") {
     "//third_party/icu",
     "//third_party/leveldatabase",
     "//third_party/re2",
-    "//third_party/webrtc_overrides",
     "//third_party/widevine/cdm:headers",
     "//ui/accessibility",
     "//ui/base:test_support",
@@ -1653,7 +1652,7 @@ test("content_unittests") {
     "//third_party/mesa:osmesa",
   ]
 
-  if (is_posix) {
+  if (is_posix && !is_fuchsia) {
     sources += [ "../browser/posix_file_descriptor_info_impl_unittest.cc" ]
   }
 
@@ -1758,6 +1757,7 @@ test("content_unittests") {
       "//third_party/webrtc/modules/video_capture",
       "//third_party/webrtc/rtc_base:rtc_base",
       "//third_party/webrtc/stats:rtc_stats_test_utils",
+      "//third_party/webrtc_overrides",
       "//third_party/webrtc_overrides:init_webrtc",
       "//ui/shell_dialogs:shell_dialogs",
     ]

tools/variations/fieldtrial_to_struct.py

@@ -116,7 +116,8 @@ def main(arguments):
   if not opts.platform:
     parser.error('You must specify a --platform.')
 
-  supported_platforms = ['android', 'chromeos', 'ios', 'linux', 'mac', 'win']
+  supported_platforms = ['android', 'chromeos', 'fuchsia', 'ios', 'linux',
+                         'mac', 'win']
   if opts.platform not in supported_platforms:
     parser.error('\'%s\' is an unknown platform. Supported platforms: %s' %
         (opts.platform, supported_platforms))