Plugin Power Saver: Replace all "plug-in" with "plugin" for consistency.

chrome/browser/metrics/plugin_metrics_provider.cc

Index: chrome/browser/metrics/plugin_metrics_provider.cc
diff --git a/chrome/browser/metrics/plugin_metrics_provider.cc b/chrome/browser/metrics/plugin_metrics_provider.cc
index 44491bd8e08c723176d47623f353e2be98904820..35c789bb6310a511031b29ac5959a6383d434e3d 100644
--- a/chrome/browser/metrics/plugin_metrics_provider.cc
+++ b/chrome/browser/metrics/plugin_metrics_provider.cc
@@ -301,8 +301,8 @@ void PluginMetricsProvider::LogPluginLoadingError(
   ChildProcessStats& stats = child_process_stats_buffer_[plugin.name];
   // Initialize the type if this entry is new.
   if (stats.process_type == content::PROCESS_TYPE_UNKNOWN) {
-    // The plug-in process might not actually be of type PLUGIN (which means
-    // NPAPI), but we only care that it is *a* plug-in process.
+    // The plugin process might not actually be of type PLUGIN (which means
+    // NPAPI), but we only care that it is *a* plugin process.
     stats.process_type = content::PROCESS_TYPE_PLUGIN;
   } else {
     DCHECK(IsPluginProcess(stats.process_type));