Update to Chromium revision 788460a4 (#345352)

- Mac: 10.10 SDK is now required for building (see http://crbug.com/463170#c63).
  Older SDKs can be used for a short time by setting mac_sdk_min via GYP_DEFINES.

libcef/browser/chrome_scheme_handler.cc

@@ -67,7 +67,7 @@ ChromeDomain GetChromeDomain(const std::string& domain_name) {
   };
 
   for (size_t i = 0; i < sizeof(domains) / sizeof(domains[0]); ++i) {
-    if (base::strcasecmp(domains[i].name, domain_name.c_str()) == 0)
+    if (base::EqualsCaseInsensitiveASCII(domains[i].name, domain_name.c_str()))
       return domains[i].domain;
   }