[remoting host] Initialize mojo unconditionally

Mojo needs to be initialized, even in a single-process context, to fix
a crash on startup. This CL removes the condition on
remoting_multi_process for calling mojo::core::Init().

Bug: 875462
Change-Id: I021e5248aae850962c4ef53a506a2d06413aaf77
Reviewed-on: https://chromium-review.googlesource.com/1180499
Commit-Queue: Lambros Lambrou <lambroslambrou@chromium.org>
Reviewed-by: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584250}

remoting/host/BUILD.gn

@@ -699,6 +699,7 @@ if (enable_me2me_host) {
       "//base:i18n",
       "//components/policy/core/common",
       "//ipc",
+      "//mojo/core/embedder",
       "//net",
       "//remoting/base",
       "//remoting/host",
@@ -729,10 +730,6 @@ if (enable_me2me_host) {
     if (is_mac && is_official_build) {
       sources += [ "internal/internal_mac-inl.h" ]
     }
-
-    if (remoting_multi_process != 0) {
-      deps += [ "//mojo/core/embedder" ]
-    }
   }
 
   if (is_win) {

remoting/host/host_main.cc

@@ -19,6 +19,7 @@
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
+#include "mojo/core/embedder/embedder.h"
 #include "remoting/base/breakpad.h"
 #include "remoting/host/evaluate_capability.h"
 #include "remoting/host/host_exit_codes.h"
@@ -28,10 +29,6 @@
 #include "remoting/host/switches.h"
 #include "remoting/host/usage_stats_consent.h"
 
-#if defined(REMOTING_MULTI_PROCESS)
-#include "mojo/core/embedder/embedder.h"
-#endif  // defined(REMOTING_MULTI_PROCESS)
-
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
 #endif  // defined(OS_MACOSX)
@@ -225,9 +222,7 @@ int HostMain(int argc, char** argv) {
 
   remoting::LoadResources("");
 
-#if defined(REMOTING_MULTI_PROCESS)
   mojo::core::Init();
-#endif
 
   // Invoke the entry point.
   int exit_code = main_routine();