Replace WIDEVINE_CDM_AVAILABLE with a gyp define 'enable_widevine_cdm'.

chrome/browser/plugins/plugin_info_message_filter.cc

Index: chrome/browser/plugins/plugin_info_message_filter.cc
diff --git a/chrome/browser/plugins/plugin_info_message_filter.cc b/chrome/browser/plugins/plugin_info_message_filter.cc
index 71f4b14794af7f85597f6364d56b33959a4a4904..13effc0208b272cbc3745db591d78f846f16b4b0 100644
--- a/chrome/browser/plugins/plugin_info_message_filter.cc
+++ b/chrome/browser/plugins/plugin_info_message_filter.cc
@@ -62,13 +62,13 @@ bool ShouldUseJavaScriptSettingForPlugin(const WebPluginInfo& plugin) {
     return true;
 #endif
 
-#if defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS)
+#if defined(ENABLE_WIDEVINE) && defined(ENABLE_PEPPER_CDMS)
   // Treat CDM invocations like JavaScript.
   if (plugin.name == base::ASCIIToUTF16(kWidevineCdmDisplayName)) {
     DCHECK(plugin.type == WebPluginInfo::PLUGIN_TYPE_PEPPER_OUT_OF_PROCESS);
     return true;
   }
-#endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS)
+#endif  // defined(ENABLE_WIDEVINE) && defined(ENABLE_PEPPER_CDMS)
 
   return false;
 }
@@ -84,14 +84,14 @@ enum PluginAvailabilityStatusForUMA {
 
 static void SendPluginAvailabilityUMA(const std::string& mime_type,
                                       PluginAvailabilityStatusForUMA status) {
-#if defined(WIDEVINE_CDM_AVAILABLE)
+#if defined(ENABLE_WIDEVINE)
   // Only report results for Widevine CDM.
   if (mime_type != kWidevineCdmPluginMimeType)
     return;
 
   UMA_HISTOGRAM_ENUMERATION("Plugin.AvailabilityStatus.WidevineCdm",
                             status, PLUGIN_AVAILABILITY_STATUS_MAX);
-#endif  // defined(WIDEVINE_CDM_AVAILABLE)
+#endif  // defined(ENABLE_WIDEVINE)
 }
 
 #endif  // defined(ENABLE_PEPPER_CDMS)