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 cc431616e260946987ada8d229e5db694d9be447..cefc33a275b4bce18f3a78a8f71754f6ddc6ddfd 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -252,12 +252,6 @@ static_library("browser") {
     sources += rebase_path(gypi_values.chrome_browser_mac_ios_sources,
                            ".", "//chrome")
   }
-  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 += [