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

tools/json_schema_compiler/test/content_settings.json

Index: tools/json_schema_compiler/test/content_settings.json
diff --git a/tools/json_schema_compiler/test/content_settings.json b/tools/json_schema_compiler/test/content_settings.json
index 6fac436082d1f7a96c0f3754e33a6c8044c46353..f8778faba467149334624f9e349b01aa289fe510 100644
--- a/tools/json_schema_compiler/test/content_settings.json
+++ b/tools/json_schema_compiler/test/content_settings.json
@@ -195,7 +195,7 @@
       },
       "plugins": {
         "$ref": "ContentSetting",
-        "description": "Whether to run plug-ins. One of<br><var>allow</var>: Run plug-ins automatically,<br><var>block</var>: Don't run plug-ins automatically. <br>Default is <var>allow</var>.<br>The primary URL is the main-frame URL. The secondary URL is not used.",
+        "description": "Whether to run plugins. One of<br><var>allow</var>: Run plugins automatically,<br><var>block</var>: Don't run plugins automatically. <br>Default is <var>allow</var>.<br>The primary URL is the main-frame URL. The secondary URL is not used.",
         "value": [
           "plugins",
           {"type":"string", "enum": ["allow", "block"]}