Surface Chrome SVN Revision in dev tools 'version' command

chrome/common/chrome_content_client_ios.mm

Index: chrome/common/chrome_content_client_ios.mm
diff --git a/chrome/common/chrome_content_client_ios.mm b/chrome/common/chrome_content_client_ios.mm
index 0bd3b7e012033ba28b450822c6d82d2cf8362cb8..3eefa8954cd631dd8d630982102b321c24989024 100644
--- a/chrome/common/chrome_content_client_ios.mm
+++ b/chrome/common/chrome_content_client_ios.mm
@@ -55,6 +55,13 @@ std::string ChromeContentClient::GetProduct() const {
   return product;
 }
 
+std::string ChromeContentClient::GetProductSCMRevision() const {
+  chrome::VersionInfo version_info;
+  std::string revision("@");
+  revision += version_info.is_valid() ? version_info.LastChange() : "0";
+  return revision;
+}
+
 std::string ChromeContentClient::GetUserAgent() const {
   std::string product = GetProduct();
   return webkit_glue::BuildUserAgentFromProduct(product);