webui: minimize webui flicker.

chrome/common/chrome_content_client.cc

Index: chrome/common/chrome_content_client.cc
diff --git a/chrome/common/chrome_content_client.cc b/chrome/common/chrome_content_client.cc
index d8da8c7381f9cee15ce6c3dd93fa9fd1b1a59b17..5e0f0fdfa91492346252156390e7869239b84e79 100644
--- a/chrome/common/chrome_content_client.cc
+++ b/chrome/common/chrome_content_client.cc
@@ -34,6 +34,7 @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/base/webui/web_ui_util.h"
 
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
 
@@ -512,6 +513,14 @@ base::RefCountedStaticMemory* ChromeContentClient::GetDataResourceBytes(
   return ResourceBundle::GetSharedInstance().LoadDataResourceBytes(resource_id);
 }
 
+content::WebUITextStyles ChromeContentClient::GetWebUITextStyles() const {
+  content::WebUITextStyles text_styles;
+  text_styles.font_family = webui::GetFontFamily();
+  text_styles.font_size = webui::GetFontSize();
+  text_styles.text_direction = webui::GetTextDirection();
+  return text_styles;
+}
+
 gfx::Image& ChromeContentClient::GetNativeImageNamed(int resource_id) const {
   return ResourceBundle::GetSharedInstance().GetNativeImageNamed(resource_id);
 }