Update to Chromium version 68.0.3425.0 (#557062)

Known issues:
- Surface synchronization is now enabled for OSR, see issue #2447.
- Jumbo build is broken, fixed in https://crrev.com/868717ce.

libcef/common/crash_reporter_client.cc

@@ -18,7 +18,6 @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/crash/core/common/crash_key.h"
-#include "services/service_manager/embedder/switches.h"
 #include "third_party/crashpad/crashpad/client/annotation.h"
 
 #if defined(OS_MACOSX)
@@ -624,7 +623,7 @@ bool CefCrashReporterClient::EnableBreakpadForProcess(
     const std::string& process_type) {
   return process_type == switches::kRendererProcess ||
          process_type == switches::kPpapiPluginProcess ||
-         process_type == service_manager::switches::kZygoteProcess ||
+         process_type == switches::kZygoteProcess ||
          process_type == switches::kGpuProcess;
 }