Upstream (most of) ios/web/public

ios/web/public/web_client.mm

Index: ios/web/public/web_client.mm
diff --git a/ios/web/public/web_client.cc b/ios/web/public/web_client.mm
similarity index 87%
rename from ios/web/public/web_client.cc
rename to ios/web/public/web_client.mm
index 0f2cf0c686380d160f957c93bf29527e4f2fe680..ef46fdf1c87b1f539800c7e74544a52d0db4af4f 100644
--- a/ios/web/public/web_client.cc
+++ b/ios/web/public/web_client.mm
@@ -4,6 +4,8 @@
 
 #include "ios/web/public/web_client.h"
 
+#include <Foundation/Foundation.h>
+
 namespace web {
 
 static WebClient* g_client;
@@ -34,6 +36,10 @@ std::string WebClient::GetAcceptLangs(BrowserState* state) const {
   return std::string();
 }
 
+std::string WebClient::GetApplicationLocale() const {
+  return "en-US";
+}
+
 bool WebClient::IsAppSpecificURL(const GURL& url) const {
   return false;
 }
@@ -65,4 +71,8 @@ base::RefCountedStaticMemory* WebClient::GetDataResourceBytes(
   return nullptr;
 }
 
+NSString* WebClient::GetEarlyPageScript(WebViewType web_view_type) const {
+  return @"";
+}
+
 }  // namespace web