[cronet] Make getAcceptLanguages index a static table instead of the application bundle.

components/cronet/ios/Cronet.mm

Index: components/cronet/ios/Cronet.mm
diff --git a/components/cronet/ios/Cronet.mm b/components/cronet/ios/Cronet.mm
index 135398acfe05aec622220113c65cd2e01d1d6134..d4217ab217f41b0c46e797cbacdac92a0c19dae3 100644
--- a/components/cronet/ios/Cronet.mm
+++ b/components/cronet/ios/Cronet.mm
@@ -14,6 +14,7 @@
 #include "base/memory/scoped_vector.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/synchronization/lock.h"
+#include "components/cronet/ios/accept_languages_table.h"
 #include "components/cronet/ios/cronet_environment.h"
 #include "components/cronet/url_request_context_config.h"
 #include "ios/net/crn_http_protocol_handler.h"
@@ -43,6 +44,7 @@ RequestFilterBlock gRequestFilterBlock = nil;
 std::unique_ptr<CronetHttpProtocolHandlerDelegate> gHttpProtocolHandlerDelegate;
 NSURLCache* gPreservedSharedURLCache = nil;
 BOOL gEnableTestCertVerifierForTesting = FALSE;
+NSString* gAcceptLanguages = nil;
 
 // CertVerifier, which allows any certificates for testing.
 class TestCertVerifier : public net::CertVerifier {
@@ -116,20 +118,34 @@ class CronetHttpProtocolHandlerDelegate
   }
 }
 
++ (NSString*)getAcceptLanguagesFromPreferredLanguages:
+    (NSArray<NSString*>*)languages {
+  NSMutableArray* acceptLanguages = [NSMutableArray new];
+  for (NSString* lang_region in languages) {
+    NSString* lang = [lang_region componentsSeparatedByString:@"-"][0];
+    NSString* localeAcceptLangs = acceptLangs[lang_region] ?: acceptLangs[lang];
+    if (localeAcceptLangs)
+      [acceptLanguages
+          addObjectsFromArray:[localeAcceptLangs
+                                  componentsSeparatedByString:@","]];
+  }
+
+  NSString* acceptLanguageString =
+      [[[NSOrderedSet orderedSetWithArray:acceptLanguages] array]
+          componentsJoinedByString:@","];
+
+  return [acceptLanguageString length] != 0 ? acceptLanguageString
+                                            : @"en-US,en";
+}
+
 + (NSString*)getAcceptLanguages {
-  // Use the framework bundle to search for resources.
-  NSBundle* frameworkBundle = [NSBundle bundleForClass:self];
-  NSString* bundlePath =
-      [frameworkBundle pathForResource:@"cronet_resources" ofType:@"bundle"];
-  NSBundle* bundle = [NSBundle bundleWithPath:bundlePath];
-  NSString* acceptLanguages = NSLocalizedStringWithDefaultValue(
-      @"IDS_ACCEPT_LANGUAGES", @"Localizable", bundle, @"en-US,en",
-      @"These values are copied from Chrome's .xtb files, so the same "
-       "values are used in the |Accept-Language| header. Key name matches "
-       "Chrome's.");
-  if (acceptLanguages == Nil)
-    acceptLanguages = @"";
-  return acceptLanguages;
+  return [self
+      getAcceptLanguagesFromPreferredLanguages:[NSLocale preferredLanguages]];
+}
+
++ (void)setAcceptLanguages:(NSString*)acceptLanguages {
+  [self checkNotStarted];
+  gAcceptLanguages = acceptLanguages;
 }
 
 + (void)checkNotStarted {
@@ -193,7 +209,7 @@ class CronetHttpProtocolHandlerDelegate
   gChromeNet.Get().reset(
       new cronet::CronetEnvironment(user_agent, gUserAgentPartial));
   gChromeNet.Get()->set_accept_language(
-      base::SysNSStringToUTF8([self getAcceptLanguages]));
+      base::SysNSStringToUTF8(gAcceptLanguages ?: [self getAcceptLanguages]));
 
   gChromeNet.Get()->set_http2_enabled(gHttp2Enabled);
   gChromeNet.Get()->set_quic_enabled(gQuicEnabled);