Select theme resources from ResourceBundle at requested scale factor.

chrome/renderer/extensions/extension_dispatcher.cc

Index: chrome/renderer/extensions/extension_dispatcher.cc
diff --git a/chrome/renderer/extensions/extension_dispatcher.cc b/chrome/renderer/extensions/extension_dispatcher.cc
index 9706f67b91a70a177997fc637ad46c993f578126..30876ca28ee3f0098188cb308dba2c894c0a9c8e 100644
--- a/chrome/renderer/extensions/extension_dispatcher.cc
+++ b/chrome/renderer/extensions/extension_dispatcher.cc
@@ -57,6 +57,7 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURLRequest.h"
+#include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "v8/include/v8.h"
 
@@ -412,7 +413,8 @@ void ExtensionDispatcher::OnLoaded(
     patterns.assign(platform_app_patterns);
     WebView::addUserStyleSheet(
         WebString::fromUTF8(ResourceBundle::GetSharedInstance().
-                            GetRawDataResource(IDR_PLATFORM_APP_CSS)),
+            GetRawDataResource(IDR_PLATFORM_APP_CSS,
+                               ui::SCALE_FACTOR_NONE)),
         patterns,
         WebView::UserContentInjectInAllFrames,
         WebView::UserStyleInjectInExistingDocuments);