Implement default css for toolstrips.

chrome/browser/renderer_host/render_view_host.h

Index: chrome/browser/renderer_host/render_view_host.h
diff --git a/chrome/browser/renderer_host/render_view_host.h b/chrome/browser/renderer_host/render_view_host.h
index 31e5315da074ae80982fd788b06d059e3ef759fb..5de1a303df30cf6e4179589c6c5c06c695ab468d 100644
--- a/chrome/browser/renderer_host/render_view_host.h
+++ b/chrome/browser/renderer_host/render_view_host.h
@@ -229,6 +229,10 @@ class RenderViewHost : public RenderWidgetHost {
   void ExecuteJavascriptInWebFrame(const std::wstring& frame_xpath,
                                    const std::wstring& jscript);
 
+  // Insert some css into a frame in the page.
+  void InsertCSSInWebFrame(const std::wstring& frame_xpath,
+                           const std::string& css);
+
   // Logs a message to the console of a frame in the page.
   void AddMessageToConsole(const std::wstring& frame_xpath,
                            const std::wstring& msg,