[DevTools] Cleanup DevToolsTarget and DevToolsManagerDelegate after moving to devtools_discovery.

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 f1cb6e4e5b860f0a647792b6a247041580ffc256..b2cb43947a740cc52e8461a54760f7d30442dff9 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -33,6 +33,7 @@
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 #include "chrome/browser/defaults.h"
+#include "chrome/browser/devtools/chrome_devtools_manager_delegate.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/browser/font_family_cache.h"
 #include "chrome/browser/geolocation/chrome_access_token_store.h"
@@ -175,12 +176,6 @@
 #include "ui/gfx/android/device_display_info.h"
 #endif
 
-#if defined(OS_ANDROID)
-#include "chrome/browser/android/dev_tools_manager_delegate_android.h"
-#else
-#include "chrome/browser/devtools/chrome_devtools_manager_delegate.h"
-#endif
-
 #if defined(TOOLKIT_VIEWS)
 #include "chrome/browser/ui/views/chrome_browser_main_extra_parts_views.h"
 #endif
@@ -2367,11 +2362,7 @@ void ChromeContentBrowserClient::RecordURLMetric(const std::string& metric,
 
 content::DevToolsManagerDelegate*
 ChromeContentBrowserClient::GetDevToolsManagerDelegate() {
-#if defined(OS_ANDROID)
-  return new DevToolsManagerDelegateAndroid();
-#else
   return new ChromeDevToolsManagerDelegate();
-#endif
 }
 
 content::TracingDelegate* ChromeContentBrowserClient::GetTracingDelegate() {