Change NOTREACHED to LOG(ERROR)

Fix crashes when DCHECKs enabled since we are running into this issue.

Bug: b/143316162
Test: None
Change-Id: Ic4f20131281f1cbc0f7f80f5377804fb40731f46
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1884818Reviewed-by: Sean Topping <seantopping@chromium.org>
Commit-Queue: Daniel Nicoara <dnicoara@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710017}

chromecast/browser/cast_content_browser_client.cc

@@ -973,7 +973,7 @@ void CastContentBrowserClient::RegisterNonNetworkSubresourceURLLoaderFactories(
     int render_frame_id,
     NonNetworkURLLoaderFactoryMap* factories) {
   if (render_frame_id == MSG_ROUTING_NONE) {
-    NOTREACHED() << "Service worker not supported.";
+    LOG(ERROR) << "Service worker not supported.";
     return;
   }
   content::RenderFrameHost* frame_host =