Refactor language detection logic to allow non-static CLD data sources.

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index af3c9e6b6b272ca6cc76cea07813fb671e9f7bbb..efbee58e9a1cebc9096a8c7d708062eaef2d3228 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -236,12 +236,6 @@ static_library("browser") {
       #"browser_app_shim"  TODO(GYP)
     ]
   }
-  if (cld2_data_source == "component") {
-    sources += [
-      "component_updater/cld_component_installer.cc",
-      "component_updater/cld_component_installer.h",
-    ]
-  }
   if (enable_extensions) {
     public_deps += [ "//chrome/browser/extensions" ]
     deps += [