Add blimp to root GN check_targets

blimp/engine/common/blimp_content_client.cc

Index: blimp/engine/common/blimp_content_client.cc
diff --git a/blimp/engine/common/blimp_content_client.cc b/blimp/engine/common/blimp_content_client.cc
index cc57be195a37310c231422fc2cf8e288cf79d38b..a234adb19860ec3fc62a2444de210404845de68a 100644
--- a/blimp/engine/common/blimp_content_client.cc
+++ b/blimp/engine/common/blimp_content_client.cc
@@ -4,26 +4,12 @@
 
 #include "blimp/engine/common/blimp_content_client.h"
 
-#include "components/version_info/version_info.h"
-#include "content/public/common/user_agent.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
 namespace blimp {
 namespace engine {
 
-std::string client_os_info = "Linux; Android 5.1.1";
-
-std::string GetBlimpEngineUserAgent() {
-  return content::BuildUserAgentFromOSAndProduct(
-      client_os_info,
-      version_info::GetProductNameAndVersionForUserAgent() + " Mobile");
-}
-
-void SetClientOSInfo(std::string os_version_info) {
-  client_os_info = os_version_info;
-}
-
 BlimpContentClient::~BlimpContentClient() {}
 
 std::string BlimpContentClient::GetUserAgent() const {