Select theme resources from ResourceBundle at requested scale factor.

ui/base/resource/data_pack_literal.cc

Index: ui/base/resource/data_pack_literal.cc
diff --git a/ui/base/resource/data_pack_literal.cc b/ui/base/resource/data_pack_literal.cc
index 510d07a1f1d399638b19381b3becf674e4101c61..3d8c60347f80bf0cae2ffdc279b6dea0e548e01b 100644
--- a/ui/base/resource/data_pack_literal.cc
+++ b/ui/base/resource/data_pack_literal.cc
@@ -21,4 +21,23 @@ extern const char kSamplePakContents[] = {
 
 extern const size_t kSamplePakSize = sizeof(kSamplePakContents);
 
+extern const char kSamplePakContents2x[] = {
+    0x04, 0x00, 0x00, 0x00,               // header(version
+    0x01, 0x00, 0x00, 0x00,               //        no. entries
+    0x01,                                 //        encoding)
+    0x04, 0x00, 0x15, 0x00, 0x00, 0x00,   // index entry 4
+    0x00, 0x00, 0x24, 0x00, 0x00, 0x00,   // extra entry for the size of last
+    't', 'h', 'i', 's', ' ', 'i', 's', ' ', 'i', 'd', ' ', '4', ' ', '2', 'x'
+};
+
+extern const size_t kSamplePakSize2x = sizeof(kSamplePakContents2x);
+
+extern const char kEmptyPakContents[] = {
+    0x04, 0x00, 0x00, 0x00,               // header(version
+    0x00, 0x00, 0x00, 0x00,               //        no. entries
+    0x01
+};
+
+extern const size_t kEmptyPakSize = sizeof(kEmptyPakContents);
+
 }  // namespace ui