Cleanup: Fix some lint/style errors in extensions code.

chrome/browser/extensions/api/tabs/tabs_constants.h

Index: chrome/browser/extensions/api/tabs/tabs_constants.h
===================================================================
--- chrome/browser/extensions/api/tabs/tabs_constants.h	(revision 247534)
+++ chrome/browser/extensions/api/tabs/tabs_constants.h	(working copy)
@@ -23,7 +23,9 @@
 extern const char kFormatKey[];
 extern const char kFromIndexKey[];
 extern const char kHeightKey[];
+extern const char kHighlightedKey[];
 extern const char kIdKey[];
+extern const char kIncognitoKey[];
 extern const char kIndexKey[];
 extern const char kLastFocusedWindowKey[];
 extern const char kLeftKey[];
@@ -34,7 +36,6 @@
 extern const char kOpenerTabIdKey[];
 extern const char kPinnedKey[];
 extern const char kQualityKey[];
-extern const char kHighlightedKey[];
 extern const char kRunAtKey[];
 extern const char kSelectedKey[];
 extern const char kShowStateKey[];
@@ -46,10 +47,9 @@
 extern const char kToIndexKey[];
 extern const char kTopKey[];
 extern const char kUrlKey[];
+extern const char kWidthKey[];
 extern const char kWindowClosing[];
-extern const char kWidthKey[];
 extern const char kWindowIdKey[];
-extern const char kIncognitoKey[];
 extern const char kWindowTypeKey[];
 extern const char kWindowTypeLongKey[];