DevTools: migrate DevTools APIs to use WebContents instead of RenderViewHost.

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 0b530e8a8a709f7241d2531451cab65702528c4e..7b522f2ec845da49749cda0f385784460cda173e 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -616,10 +616,10 @@ void ExtensionService::ReloadExtensionImpl(
     extensions::ProcessManager* manager = system_->process_manager();
     extensions::ExtensionHost* host =
         manager->GetBackgroundHostForExtension(extension_id);
-    if (host && DevToolsAgentHost::HasFor(host->render_view_host())) {
+    if (host && DevToolsAgentHost::HasFor(host->host_contents())) {
       // Look for an open inspector for the background page.
       scoped_refptr<DevToolsAgentHost> agent_host =
-          DevToolsAgentHost::GetOrCreateFor(host->render_view_host());
+          DevToolsAgentHost::GetOrCreateFor(host->host_contents());
       agent_host->DisconnectRenderViewHost();
       orphaned_dev_tools_[extension_id] = agent_host;
     }