Initialize all ImageCandidate's member variables

Source/core/html/parser/HTMLSrcsetParserTest.cpp

Index: Source/core/html/parser/HTMLSrcsetParserTest.cpp
diff --git a/Source/core/html/parser/HTMLSrcsetParserTest.cpp b/Source/core/html/parser/HTMLSrcsetParserTest.cpp
index fcb6b2f37cd4c536d4909939109f60da5b1e4a8c..76236102f90d97eab2a2c81bc02716c0c448f8d9 100644
--- a/Source/core/html/parser/HTMLSrcsetParserTest.cpp
+++ b/Source/core/html/parser/HTMLSrcsetParserTest.cpp
@@ -20,6 +20,15 @@ typedef struct {
     int outputResourceWidth;
 } TestCase;
 
+TEST(ImageCandidateTest, Basic)
+{
+    ImageCandidate candidate;
+    ASSERT_EQ(candidate.density(), 1);
+    ASSERT_EQ(candidate.resourceWidth(), -1);
+    ASSERT_EQ(candidate.srcOrigin(), false);
+
+}
+
 TEST(HTMLSrcsetParserTest, Basic)
 {
     TestCase testCases[] = {