Track when fallback icon color is the default.

ios/chrome/browser/favicon/large_icon_cache_unittest.cc

Index: ios/chrome/browser/favicon/large_icon_cache_unittest.cc
diff --git a/ios/chrome/browser/favicon/large_icon_cache_unittest.cc b/ios/chrome/browser/favicon/large_icon_cache_unittest.cc
index 020c442ec7ad9c2e72fe8fe092692d6a14c98ff3..c9823f4ee803d528e3435d8f745736b3c77634f8 100644
--- a/ios/chrome/browser/favicon/large_icon_cache_unittest.cc
+++ b/ios/chrome/browser/favicon/large_icon_cache_unittest.cc
@@ -43,6 +43,7 @@ class LargeIconCacheTest : public testing::Test {
   LargeIconCacheTest() {
     expected_fallback_icon_style_.reset(new favicon_base::FallbackIconStyle());
     expected_fallback_icon_style_->background_color = kTestColor;
+    expected_fallback_icon_style_->is_default_background_color = false;
     expected_bitmap_ = CreateTestBitmap(24, 24, kTestColor);
     large_icon_cache_.reset(new LargeIconCache);
   }
@@ -86,6 +87,7 @@ TEST_F(LargeIconCacheTest, RetreiveItem) {
   EXPECT_EQ(false, result2->bitmap.is_valid());
   EXPECT_EQ(expected_result2->fallback_icon_style->background_color,
             result2->fallback_icon_style->background_color);
+  EXPECT_FALSE(result2->fallback_icon_style->is_default_background_color);
 
   // Test overwriting kDummyUrl.
   large_icon_cache_->SetCachedResult(GURL(kDummyUrl), *expected_result2);
@@ -94,6 +96,7 @@ TEST_F(LargeIconCacheTest, RetreiveItem) {
   EXPECT_EQ(false, result3->bitmap.is_valid());
   EXPECT_EQ(expected_result2->fallback_icon_style->background_color,
             result3->fallback_icon_style->background_color);
+  EXPECT_FALSE(result2->fallback_icon_style->is_default_background_color);
 }
 
 }  // namespace