EXO: Adjusted client_base for cast

Moved shell and aura shell checks to when not using fullscreen shell.
This is needed for cast to run fullscreen clients.

Bug: 896710
Test: Compiled client on ChromeOS.
Change-Id: Ie4c408d8266a0957ad9b57ea332a8e38171b2be9
Reviewed-on: https://chromium-review.googlesource.com/c/1331170Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Commit-Queue: Shawn Gallea <sagallea@google.com>
Cr-Commit-Position: refs/heads/master@{#607235}

components/exo/wayland/clients/client_base.cc

@@ -419,18 +419,10 @@ bool ClientBase::Init(const InitParams& params) {
     LOG(ERROR) << "Can't find linux_dmabuf interface";
     return false;
   }
-  if (!globals_.shell) {
-    LOG(ERROR) << "Can't find shell interface";
-    return false;
-  }
   if (!globals_.seat) {
     LOG(ERROR) << "Can't find seat interface";
     return false;
   }
-  if (!globals_.aura_shell) {
-    LOG(ERROR) << "Can't find aura shell interface";
-    return false;
-  }
 
 #if defined(USE_GBM)
   sk_sp<const GrGLInterface> native_interface;
@@ -577,6 +569,14 @@ bool ClientBase::Init(const InitParams& params) {
                                             surface_.get(), 0, nullptr);
 
   } else {
+    if (!globals_.shell) {
+      LOG(ERROR) << "Can't find shell interface";
+      return false;
+    }
+    if (!globals_.aura_shell) {
+      LOG(ERROR) << "Can't find aura shell interface";
+      return false;
+    }
     std::unique_ptr<wl_shell_surface> shell_surface(
         static_cast<wl_shell_surface*>(
             wl_shell_get_shell_surface(globals_.shell.get(), surface_.get())));