[Icons NTP] Add a flag to enable large icons on the NTP.

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 3edff1d9c49408b5aa8df4567f33a49fdf4583ca..1938051c788b7b126ae5d16d0e93fa45dcaa5910 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -265,6 +265,9 @@ const char kDisableExtensionsFileAccessCheck[] =
 const char kDisableExtensionsHttpThrottling[] =
     "disable-extensions-http-throttling";
 
+// Disables large icons on the New Tab page.
+const char kDisableIconNtp[]                = "disable-icon-ntp";
+
 // Don't resolve hostnames to IPv6 addresses. This can be used when debugging
 // issues relating to IPv6, but shouldn't otherwise be needed. Be sure to file
 // bugs if something isn't working properly in the presence of IPv6. This flag
@@ -457,6 +460,9 @@ const char kEnableExtensionActivityLogTesting[] =
 // crbug.com/142458 .
 const char kEnableFastUnload[]         = "enable-fast-unload";
 
+// Enables large icons on the New Tab page.
+const char kEnableIconNtp[]                 = "enable-icon-ntp";
+
 // Enable opt-in for the collection of invalid TLS/SSL certificate chains.
 const char kEnableInvalidCertCollection[] = "enable-invalid-cert-collection";