Transmit a X-Chrome-UMA-Enabled bit to Google domains from clients that have UMA enabled.

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 d95b116045a0246ec9d7e3f54b07d9bc7865c328..22b17fc1edae237796b5296a60a9a6490ee8e221 100644
--- a/chrome/browser/google/google_util.cc
+++ b/chrome/browser/google/google_util.cc
@@ -44,13 +44,6 @@ bool HasQueryParameter(const std::string& str) {
   return false;
 }
 
-// True if |url| is an HTTP[S] request with host "[www.]google.<TLD>" and no
-// explicit port.
-bool IsGoogleDomainUrl(const GURL& url) {
-  return url.is_valid() && (url.SchemeIs("http") || url.SchemeIs("https")) &&
-      url.port().empty() && google_util::IsGoogleHostname(url.host());
-}
-
 }  // anonymous namespace
 
 namespace google_util {
@@ -142,21 +135,32 @@ bool GetReactivationBrand(std::string* brand) {
 
 #endif
 
-bool IsGoogleHostname(const std::string& host) {
+bool IsGoogleDomainUrl(const std::string& url, SubdomainPermission permission) {
+  GURL original_url(url);
+  return original_url.is_valid() && original_url.port().empty() &&
+      (original_url.SchemeIs("http") || original_url.SchemeIs("https")) &&
+      google_util::IsGoogleHostname(original_url.host(), permission);
+}
+
+bool IsGoogleHostname(const std::string& host,
+                      SubdomainPermission permission) {
   size_t tld_length =
       net::RegistryControlledDomainService::GetRegistryLength(host, false);
   if ((tld_length == 0) || (tld_length == std::string::npos))
     return false;
   std::string host_minus_tld(host, 0, host.length() - tld_length);
-  return LowerCaseEqualsASCII(host_minus_tld, "www.google.") ||
-      LowerCaseEqualsASCII(host_minus_tld, "google.");
+  if (LowerCaseEqualsASCII(host_minus_tld, "google."))
+    return true;
+  if (permission == ALLOW_SUBDOMAIN)
+    return EndsWith(host_minus_tld, ".google.", false);
+  return LowerCaseEqualsASCII(host_minus_tld, "www.google.");
 }
 
 bool IsGoogleHomePageUrl(const std::string& url) {
   GURL original_url(url);
 
   // First check to see if this has a Google domain.
-  if (!IsGoogleDomainUrl(original_url))
+  if (!IsGoogleDomainUrl(url, DISALLOW_SUBDOMAIN))
     return false;
 
   // Make sure the path is a known home page path.
@@ -173,7 +177,7 @@ bool IsGoogleSearchUrl(const std::string& url) {
   GURL original_url(url);
 
   // First check to see if this has a Google domain.
-  if (!IsGoogleDomainUrl(original_url))
+  if (!IsGoogleDomainUrl(url, DISALLOW_SUBDOMAIN))
     return false;
 
   // Make sure the path is a known search path.