First fix to minimize copying of image data.

chrome/browser/dom_ui/dom_ui_theme_source_unittest.cc

Index: chrome/browser/dom_ui/dom_ui_theme_source_unittest.cc
diff --git a/chrome/browser/dom_ui/dom_ui_theme_source_unittest.cc b/chrome/browser/dom_ui/dom_ui_theme_source_unittest.cc
index 653c2ef118a1e6d8924181872e1cfc4b280c4a6e..f33bf2746d9a5de60d188dcc0c6b141f5908e3a9 100644
--- a/chrome/browser/dom_ui/dom_ui_theme_source_unittest.cc
+++ b/chrome/browser/dom_ui/dom_ui_theme_source_unittest.cc
@@ -19,8 +19,8 @@ class MockThemeSource : public DOMUIThemeSource {
         result_data_size_(0) {
   }
 
-  virtual void SendResponse(int request_id, RefCountedBytes* data) {
-    result_data_size_ = data ? data->data.size() : 0;
+  virtual void SendResponse(int request_id, RefCountedMemory* data) {
+    result_data_size_ = data ? data->size() : 0;
     result_request_id_ = request_id;
   }