[rlz,cros] RLZ glue for ChromeOS.

chrome/browser/google/google_util.cc

Index: chrome/browser/google/google_util.cc
diff --git a/chrome/browser/google/google_util.cc b/chrome/browser/google/google_util.cc
index 0d47f5675ab91f8479ddee5385c3c2b49f715810..b690d907b667f7dfecbde2a75cae6905470ed1b5 100644
--- a/chrome/browser/google/google_util.cc
+++ b/chrome/browser/google/google_util.cc
@@ -23,6 +23,11 @@
 
 #if defined(OS_MACOSX)
 #include "chrome/browser/mac/keystone_glue.h"
+#elif defined(OS_CHROMEOS)
+#include "base/file_util.h"
+#include "base/lazy_instance.h"
+#include "base/string_util.h"
+#include "base/threading/thread_restrictions.h"
 #endif
 
 #if defined(GOOGLE_CHROME_BUILD)
@@ -55,6 +60,33 @@ bool HasQueryParameter(const std::string& str) {
 
 bool gUseMockLinkDoctorBaseURLForTesting = false;
 
+#if defined(OS_CHROMEOS)
+// Path to file that stores RLZ brand code on ChromeOS.
+const char kRLZBrandFilePath[] =
+    FILE_PATH_LITERAL("/opt/oem/etc/rlz_brand_code");
+
+// Simple class for caching brand code, meant to be used as a LazyInstance.
+class BrandCode {
+ public:
+  BrandCode() {
+    // Need to perform I/O for the first time, same as on Win.
+    base::ThreadRestrictions::ScopedAllowIO allow_io;
+    FilePath brand_file_path(kRLZBrandFilePath);
+    if (!file_util::ReadFileToString(brand_file_path, &brand_))
+      LOG(WARNING) << "Brand code file missing: " << brand_file_path.value();
+    TrimWhitespace(brand_, TRIM_ALL, &brand_);
+  }
+
+  // Brand code, may be empty.
+  const std::string& brand() { return brand_; }
+
+ private:
+  std::string brand_;
+};
+
+base::LazyInstance<BrandCode> g_cached_brand = LAZY_INSTANCE_INITIALIZER;
+#endif
+
 }  // anonymous namespace
 
 namespace google_util {
@@ -140,6 +172,8 @@ bool GetBrand(std::string* brand) {
 
 #if defined(OS_MACOSX)
   brand->assign(keystone_glue::BrandCode());
+#elif defined(OS_CHROMEOS)
+  brand->assign(g_cached_brand.Get().brand());
 #else
   brand->clear();
 #endif