cros/linux: Enable breakpad for utility processes

We get utility process crashes on Windows (via Crashpad) but we
don't get them on Linux or Chrome OS (via Breakpad). Enable breakpad
for utility processes as well.

utility process, see crash uploader logging its upload attempt

Bug: 776022
Test: run chrome --enable-crash-reporting-for-testing and crash the
Change-Id: Iaaec05ab856bb1c2515e0798a7c2caf6adacc5d3
Reviewed-on: https://chromium-review.googlesource.com/726852Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Jay Civelli <jcivelli@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#510113}

chrome/app/chrome_crash_reporter_client.cc

@@ -138,5 +138,6 @@ bool ChromeCrashReporterClient::EnableBreakpadForProcess(
   return process_type == switches::kRendererProcess ||
          process_type == switches::kPpapiPluginProcess ||
          process_type == switches::kZygoteProcess ||
-         process_type == switches::kGpuProcess;
+         process_type == switches::kGpuProcess ||
+         process_type == switches::kUtilityProcess;
 }

chrome/browser/chrome_content_browser_client.cc

@@ -613,6 +613,13 @@ int GetCrashSignalFD(const base::CommandLine& command_line) {
     return crash_handler->GetDeathSignalSocket();
   }
 
+  if (process_type == switches::kUtilityProcess) {
+    static breakpad::CrashHandlerHostLinux* crash_handler = nullptr;
+    if (!crash_handler)
+      crash_handler = CreateCrashHandlerHost(process_type);
+    return crash_handler->GetDeathSignalSocket();
+  }
+
   return -1;
 }
 #endif  // defined(OS_POSIX) && !defined(OS_ANDROID) && !defined(OS_MACOSX)