Add per-tab "JavaScript enabled" preference.

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 576f3babe3920ad31b1d68ad06bd697b581d3f42..f232352c8817be38ba2e668e263b782a17100ed0 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -186,7 +186,8 @@ const char kWebKitDefaultFixedFontSize[] =
 const char kWebKitMinimumFontSize[] = "webkit.webprefs.minimum_font_size";
 const char kWebKitMinimumLogicalFontSize[] =
     "webkit.webprefs.minimum_logical_font_size";
-const char kWebKitJavascriptEnabled[] = "webkit.webprefs.javascript_enabled";
+const char kWebKitGlobalJavascriptEnabled[] =
+    "webkit.webprefs.global.javascript_enabled";
 const char kWebKitWebSecurityEnabled[] = "webkit.webprefs.web_security_enabled";
 const char kWebKitJavascriptCanOpenWindowsAutomatically[] =
     "webkit.webprefs.javascript_can_open_windows_automatically";
@@ -208,6 +209,9 @@ const char kWebKitAllowDisplayingInsecureContent[] =
 const char kWebKitAllowRunningInsecureContent[] =
     "webkit.webprefs.allow_running_insecure_content";
 
+// Settings below can be overridden for each tab individually.
+const char kWebKitJavascriptEnabled[] = "webkit.webprefs.javascript_enabled";
+
 // Boolean which specifies whether the bookmark bar is visible on all tabs.
 const char kShowBookmarkBar[] = "bookmark_bar.show_on_all_tabs";