X11: Better timestamp handling for _NET_ACTIVE_WINDOW

chrome/browser/ui/startup/startup_browser_creator.cc

Index: chrome/browser/ui/startup/startup_browser_creator.cc
diff --git a/chrome/browser/ui/startup/startup_browser_creator.cc b/chrome/browser/ui/startup/startup_browser_creator.cc
index 11e51f87a412c529176e3afbb26c78733ad20f43..cc899a45852fff140c32d8bd0a216b839a9e41aa 100644
--- a/chrome/browser/ui/startup/startup_browser_creator.cc
+++ b/chrome/browser/ui/startup/startup_browser_creator.cc
@@ -104,6 +104,10 @@
 #include "components/search_engines/desktop_search_utils.h"
 #endif
 
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+#include "ui/views/widget/desktop_aura/x11_desktop_handler.h"
+#endif
+
 #if defined(ENABLE_PRINT_PREVIEW)
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service_factory.h"
@@ -712,6 +716,21 @@ bool StartupBrowserCreator::ProcessCmdLineImpl(
   }
 #endif  // defined(OS_WIN)
 
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+  // Our request to Activate may be discarded on some linux window
+  // managers unless given a recent timestamp, so update the timestamp if
+  // we were given one.
+  if (command_line.HasSwitch(switches::kWmUserTimeMs)) {
+    uint64_t time;
+    std::string switch_value =
+        command_line.GetSwitchValueASCII(switches::kWmUserTimeMs);
+    if (base::StringToUint64(switch_value, &time)) {
+      views::X11DesktopHandler::get()->set_wm_user_time_ms(
+          static_cast<Time>(time));
+    }
+  }
+#endif
+
   chrome::startup::IsProcessStartup is_process_startup = process_startup ?
       chrome::startup::IS_PROCESS_STARTUP :
       chrome::startup::IS_NOT_PROCESS_STARTUP;
@@ -748,7 +767,6 @@ bool StartupBrowserCreator::ProcessCmdLineImpl(
       last_used_profile = last_opened_profiles[0];
     }
 #endif
-
     // Launch the last used profile with the full command line, and the other
     // opened profiles without the URLs to launch.
     base::CommandLine command_line_without_urls(command_line.GetProgram());
@@ -772,7 +790,6 @@ bool StartupBrowserCreator::ProcessCmdLineImpl(
           startup_pref.type == SessionStartupPref::DEFAULT &&
           !HasPendingUncleanExit(*it))
         continue;
-
       if (!LaunchBrowser((*it == last_used_profile) ? command_line
                                                     : command_line_without_urls,
                          *it, cur_dir, is_process_startup, is_first_run))