Disable StoragePartitionImpl DCHECK's on ChromeOS

Bug: 911173
Change-Id: I8ecef4636e421c0e698af3d5f1796fca78cb269a
Reviewed-on: https://chromium-review.googlesource.com/c/1359330Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Robbie McElrath <rmcelrath@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613355}

content/browser/storage_partition_impl.cc

@@ -765,7 +765,8 @@ base::FilePath StoragePartitionImpl::GetPath() {
 
 net::URLRequestContextGetter* StoragePartitionImpl::GetURLRequestContext() {
   // TODO(jam): enable for all, still used on WebView and Chromecast
-#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
+#if defined(OS_WIN) || defined(OS_MACOSX) || \
+    (defined(OS_LINUX) && !defined(OS_CHROMEOS))
   if (base::FeatureList::IsEnabled(network::features::kNetworkService))
     DCHECK(g_allow_get_url_request_context);
 #endif
@@ -774,7 +775,8 @@ net::URLRequestContextGetter* StoragePartitionImpl::GetURLRequestContext() {
 
 net::URLRequestContextGetter*
 StoragePartitionImpl::GetMediaURLRequestContext() {
-#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
+#if defined(OS_WIN) || defined(OS_MACOSX) || \
+    (defined(OS_LINUX) && !defined(OS_CHROMEOS))
   if (base::FeatureList::IsEnabled(network::features::kNetworkService))
     DCHECK(g_allow_get_url_request_context);
 #endif