From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jeremy Apthorp <nornagon@nornagon.net>
Date: Wed, 28 Aug 2019 12:21:25 -0700
Subject: expose SetUserAgent on NetworkContext

Applying
https://chromium-review.googlesource.com/c/chromium/src/+/1585083 before
it's merged. There may end up being a better way of doing this, or the
patch may be merged upstream, at which point this patch should be
removed.

diff --git a/net/url_request/static_http_user_agent_settings.h b/net/url_request/static_http_user_agent_settings.h
index 0ab8187b0db8ae6db46d81738f653a2bc4c566f6..de3d55e85c22317f7f9375eb94d0d5d41b0dbd3b 100644
--- a/net/url_request/static_http_user_agent_settings.h
+++ b/net/url_request/static_http_user_agent_settings.h
@@ -30,13 +30,17 @@ class NET_EXPORT StaticHttpUserAgentSettings : public HttpUserAgentSettings {
     accept_language_ = new_accept_language;
   }
 
+  void set_user_agent(const std::string& new_user_agent) {
+    user_agent_ = new_user_agent;
+  }
+
   // HttpUserAgentSettings implementation
   std::string GetAcceptLanguage() const override;
   std::string GetUserAgent() const override;
 
  private:
   std::string accept_language_;
-  const std::string user_agent_;
+  std::string user_agent_;
 };
 
 }  // namespace net
diff --git a/services/network/network_context.cc b/services/network/network_context.cc
index 985de2b44ed5b2d567a080a1834bbfd8aa7a82a0..b2faaaefe1fd5bde36ca33b759367e648245f1ae 100644
--- a/services/network/network_context.cc
+++ b/services/network/network_context.cc
@@ -1910,6 +1910,13 @@ void NetworkContext::EnableDurableMessageCollector(
   it->second->AddReceiver(std::move(receiver));
 }
 
+void NetworkContext::SetUserAgent(const std::string& new_user_agent) {
+  // This may only be called on NetworkContexts created with a constructor that
+  // calls ApplyContextParamsToBuilder.
+  DCHECK(user_agent_settings_);
+  user_agent_settings_->set_user_agent(new_user_agent);
+}
+
 void NetworkContext::SetAcceptLanguage(const std::string& new_accept_language) {
   // This may only be called on NetworkContexts created with the constructor
   // that calls MakeURLRequestContext().
diff --git a/services/network/network_context.h b/services/network/network_context.h
index df0e1e7ebf4a127e0cc8d8617f293c94862f9783..a014b219a3793b53dc2670d55d6c3f12f23a8a77 100644
--- a/services/network/network_context.h
+++ b/services/network/network_context.h
@@ -336,6 +336,7 @@ class COMPONENT_EXPORT(NETWORK_SERVICE) NetworkContext
       const base::UnguessableToken& throttling_profile_id,
       mojo::PendingReceiver<network::mojom::DurableMessageCollector> receiver)
       override;
+  void SetUserAgent(const std::string& new_user_agent) override;
   void SetAcceptLanguage(const std::string& new_accept_language) override;
   void SetEnableReferrers(bool enable_referrers) override;
 #if BUILDFLAG(IS_CT_SUPPORTED)
diff --git a/services/network/public/mojom/network_context.mojom b/services/network/public/mojom/network_context.mojom
index 71aec1f17c274cdc1151fb81e6ff718abc7f310c..67f177d3d4e5ed852f5dd85ade822d5c62b9a8ea 100644
--- a/services/network/public/mojom/network_context.mojom
+++ b/services/network/public/mojom/network_context.mojom
@@ -1355,6 +1355,9 @@ interface NetworkContext {
       mojo_base.mojom.UnguessableToken throttling_profile_id,
       pending_receiver<DurableMessageCollector> receiver);
 
+  // Updates the user agent to be used for requests.
+  SetUserAgent(string new_user_agent);
+
   // Updates the Accept-Language header to be used for requests.
   SetAcceptLanguage(string new_accept_language);
 
diff --git a/services/network/test/test_network_context.h b/services/network/test/test_network_context.h
index 6a8d13ed773378b4d5b2c94c78399859dfbeb700..01d07d1d8882a57ecbed85f42f2029db84c25769 100644
--- a/services/network/test/test_network_context.h
+++ b/services/network/test/test_network_context.h
@@ -162,6 +162,7 @@ class TestNetworkContext : public mojom::NetworkContext {
   void SetNetworkConditions(
       const base::UnguessableToken& throttling_profile_id,
       std::vector<mojom::MatchedNetworkConditionsPtr>) override {}
+  void SetUserAgent(const std::string& new_user_agent) override {}
   void SetAcceptLanguage(const std::string& new_accept_language) override {}
   void SetEnableReferrers(bool enable_referrers) override {}
 #if BUILDFLAG(IS_CT_SUPPORTED)