Add flag for accepting EULA for testing feedv2 when FirstRunUtils.acceptEula() isn't available

Bug: 1152187
Change-Id: Ic0b044b6c1318d34b0107c1ec37c04aa2b0450ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2580780
Commit-Queue: Ian Wells <iwells@chromium.org>
Reviewed-by: Dan H <harringtond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836819}

components/feed/core/v2/public/feed_service.cc

@@ -6,6 +6,7 @@
 
 #include <utility>
 
+#include "base/command_line.h"
 #include "build/build_config.h"
 #include "components/feed/core/shared_prefs/pref_names.h"
 #include "components/feed/core/v2/feed_network_impl.h"
@@ -110,7 +111,11 @@ class FeedService::StreamDelegateImpl : public FeedStream::Delegate {
   }
 
   // FeedStream::Delegate.
-  bool IsEulaAccepted() override { return eula_notifier_.IsEulaAccepted(); }
+  bool IsEulaAccepted() override {
+    return eula_notifier_.IsEulaAccepted() ||
+           base::CommandLine::ForCurrentProcess()->HasSwitch(
+               "feedv2-accept-eula");
+  }
   bool IsOffline() override { return net::NetworkChangeNotifier::IsOffline(); }
   DisplayMetrics GetDisplayMetrics() override {
     return service_delegate_->GetDisplayMetrics();