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 0ccfe130f00ec3b6c75cd8ee04d5a2777e1fd00c..653829457d58bf92057cc36aa8a289703d8b0577 100644
--- a/net/url_request/static_http_user_agent_settings.h
+++ b/net/url_request/static_http_user_agent_settings.h
@@ -26,13 +26,17 @@ 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_;
 
   DISALLOW_COPY_AND_ASSIGN(StaticHttpUserAgentSettings);
 };
diff --git a/services/network/network_context.cc b/services/network/network_context.cc
index d39671bacc738e9185632bdebac31191d1a0c159..2465a053da8f95c3f643a908bbfe06143fa7d78d 100644
--- a/services/network/network_context.cc
+++ b/services/network/network_context.cc
@@ -1158,6 +1158,13 @@ void NetworkContext::SetNetworkConditions(
                                       std::move(network_conditions));
 }
 
+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 23bbc41ddfee63dacd622a1aa3cf750682501c76..68888f46623667f00ac6b6f1f7fb7d33965333a0 100644
--- a/services/network/network_context.h
+++ b/services/network/network_context.h
@@ -254,6 +254,7 @@ class COMPONENT_EXPORT(NETWORK_SERVICE) NetworkContext
   void CloseIdleConnections(CloseIdleConnectionsCallback callback) override;
   void SetNetworkConditions(const base::UnguessableToken& throttling_profile_id,
                             mojom::NetworkConditionsPtr conditions) 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_CHROMEOS_ASH)
diff --git a/services/network/public/mojom/network_context.mojom b/services/network/public/mojom/network_context.mojom
index b1e73dc3250bb8402d4becfd673fd9aa54ecd7fb..cfa9d0c197ca9851f13b088ecae4aba614c7ac55 100644
--- a/services/network/public/mojom/network_context.mojom
+++ b/services/network/public/mojom/network_context.mojom
@@ -964,6 +964,9 @@ interface NetworkContext {
   SetNetworkConditions(mojo_base.mojom.UnguessableToken throttling_profile_id,
                        NetworkConditions? conditions);
 
+  // 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 feecbe157692fe205d176e3782b24c17b85f4e18..2bd5713a46616231a5af19a5357bfbd851105582 100644
--- a/services/network/test/test_network_context.h
+++ b/services/network/test/test_network_context.h
@@ -117,6 +117,7 @@ class TestNetworkContext : public mojom::NetworkContext {
   void CloseIdleConnections(CloseIdleConnectionsCallback callback) override {}
   void SetNetworkConditions(const base::UnguessableToken& throttling_profile_id,
                             mojom::NetworkConditionsPtr conditions) 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_CHROMEOS_ASH)