Convert SetIsIncognitoProcess to use mojo.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 1c7ce3b7eb720ea5a87af2bd1158e39a2da07c23..822e38f519f59c69076d08dab20ff61ed24112d7 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -108,6 +108,7 @@
 #include "chrome/common/pepper_permission_util.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/render_messages.h"
+#include "chrome/common/renderer.mojom.h"
 #include "chrome/common/secure_origin_whitelist.h"
 #include "chrome/common/stack_sampling_configuration.h"
 #include "chrome/common/url_constants.h"
@@ -1077,8 +1078,9 @@ void ChromeContentBrowserClient::RenderProcessWillLaunch(
   host->AddFilter(new cdm::CdmMessageFilterAndroid());
 #endif
 
-  host->Send(new ChromeViewMsg_SetIsIncognitoProcess(
-      profile->IsOffTheRecord()));
+  chrome::mojom::InitialConfigurationParamsPtr ic_params =
+      chrome::mojom::InitialConfigurationParams::New();
+  ic_params->is_incognito_process = profile->IsOffTheRecord();
 
   for (size_t i = 0; i < extra_parts_.size(); ++i)
     extra_parts_[i]->RenderProcessWillLaunch(host);
@@ -1094,7 +1096,14 @@ void ChromeContentBrowserClient::RenderProcessWillLaunch(
     GetRendererContentSettingRules(
         HostContentSettingsMapFactory::GetForProfile(profile), &rules);
   }
+
+  // TODO(nigeltao): eliminate this legacy IPC. Instead, define new fields for
+  // chrome::mojom::InitialConfigurationParams and populate ic_params here.
   host->Send(new ChromeViewMsg_SetContentSettingRules(rules));
+
+  chrome::mojom::RendererAssociatedPtr renderer_interface;
+  host->GetChannel()->GetRemoteAssociatedInterface(&renderer_interface);
+  renderer_interface->InitialConfiguration(std::move(ic_params));
 }
 
 GURL ChromeContentBrowserClient::GetEffectiveURL(