Initial implementation of FeatureList in base/.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 3a31e260941ed3c323222fdf1a5ad3ec35f50342..dde04fca2262f645dbda6786c77e95446b511b2e 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -266,6 +266,9 @@ const char kDisableExtensionsFileAccessCheck[] =
 const char kDisableExtensionsHttpThrottling[] =
     "disable-extensions-http-throttling";
 
+// Comma-separated list of feature names to disable. See also kEnableFeatures.
+const char kDisableFeatures[] = "disable-features";
+
 // Disable field trial tests configured in fieldtrial_testing_config.json.
 const char kDisableFieldTrialTestingConfig[] = "disable-field-trial-config";
 
@@ -437,7 +440,10 @@ const char kEnableExtensionActivityLogTesting[] =
 // Enable the fast unload controller, which speeds up tab/window close by
 // running a tab's onunload js handler independently of the GUI -
 // crbug.com/142458 .
-const char kEnableFastUnload[]         = "enable-fast-unload";
+const char kEnableFastUnload[] = "enable-fast-unload";
+
+// Comma-separated list of feature names to enable. See also kDisableFeatures.
+const char kEnableFeatures[] = "enable-features";
 
 // Enables support for the QUIC protocol for insecure schemes (http://).
 // This is a temporary testing flag.