Implement default css for toolstrips.

chrome/browser/extensions/extension_view.cc

Index: chrome/browser/extensions/extension_view.cc
diff --git a/chrome/browser/extensions/extension_view.cc b/chrome/browser/extensions/extension_view.cc
index 6cd9c97bb67426af9b1420d5b0bb6e3d5a33eab3..b24da2246d76421eacc5735c49e4369505678a5c 100755
--- a/chrome/browser/extensions/extension_view.cc
+++ b/chrome/browser/extensions/extension_view.cc
@@ -4,7 +4,11 @@
 
 #include "chrome/browser/extensions/extension_view.h"
 
+#include "base/string_piece.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
+#include "chrome/common/resource_bundle.h"
+#include "grit/browser_resources.h"
+#include "grit/generated_resources.h"
 
 ExtensionView::ExtensionView(const GURL& url, Profile* profile) :
     HWNDHtmlView(url, this, false), profile_(profile) {
@@ -33,3 +37,11 @@ void ExtensionView::RunJavaScriptMessage(
   *did_suppress_message = true;
   render_view_host()->JavaScriptMessageBoxClosed(reply_msg, true, L"");
 }
+
+void ExtensionView::DidStartLoading(RenderViewHost* render_view_host,
+                                    int32 page_id) {
+  static const StringPiece toolstrip_css(
+      ResourceBundle::GetSharedInstance().GetRawDataResource(
+          IDR_EXTENSIONS_TOOLSTRIP_CSS));
+  render_view_host->InsertCSSInWebFrame(L"", toolstrip_css.as_string());
+}