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

content/renderer/pepper/plugin_power_saver_helper.cc

Index: content/renderer/pepper/plugin_power_saver_helper.cc
diff --git a/content/renderer/pepper/plugin_power_saver_helper.cc b/content/renderer/pepper/plugin_power_saver_helper.cc
index 9eec693fe7bf54169e42f343fecad4903c5bc003..2891980fe7f49c4afeeeaf95401667698a6f4155 100644
--- a/content/renderer/pepper/plugin_power_saver_helper.cc
+++ b/content/renderer/pepper/plugin_power_saver_helper.cc
@@ -32,13 +32,13 @@ enum PeripheralHeuristicDecision {
 const char kPeripheralHeuristicHistogram[] =
     "Plugin.PowerSaver.PeripheralHeuristic";
 
-// Maximum dimensions plug-in content may have while still being considered
+// Maximum dimensions plugin content may have while still being considered
 // peripheral content. These match the sizes used by Safari.
 const int kPeripheralContentMaxWidth = 400;
 const int kPeripheralContentMaxHeight = 300;
 
-// Plug-in content below this size in height and width is considered "tiny".
-// Tiny content is never peripheral, as tiny plug-ins often serve a critical
+// Plugin content below this size in height and width is considered "tiny".
+// Tiny content is never peripheral, as tiny plugins often serve a critical
 // purpose, and the user often cannot find and click to unthrottle it.
 const int kPeripheralContentTinySize = 5;