Consider empty url case when loading image

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

Index: third_party/WebKit/Source/web/tests/WebFrameTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
index 0cc79443ce04832706b604e4c999995648191ddb..0ab9d672b780aff66a6c1fa9488d6d545aa80287 100644
--- a/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebFrameTest.cpp
@@ -12153,4 +12153,33 @@ TEST_F(WebFrameTest, FallbackForNonexistentProvisionalNavigation) {
             child->MaybeRenderFallbackContent(WebURLError()));
 }
 
+TEST_F(WebFrameTest, AltTextOnAboutBlankPage) {
+  FrameTestHelpers::WebViewHelper web_view_helper;
+  web_view_helper.InitializeAndLoad("about:blank", true);
+  web_view_helper.Resize(WebSize(640, 480));
+  WebLocalFrameImpl* frame = web_view_helper.WebView()->MainFrameImpl();
+
+  const char kSource[] =
+      "<img id='foo' src='foo' alt='foo alt' width='200' height='200'>";
+  FrameTestHelpers::LoadHTMLString(frame, kSource, ToKURL("about:blank"));
+  web_view_helper.WebView()->UpdateAllLifecyclePhases();
+  RunPendingTasks();
+
+  // Check LayoutText with alt text "foo alt"
+  LayoutObject* layout_object = frame->GetFrame()
+                                    ->GetDocument()
+                                    ->getElementById("foo")
+                                    ->GetLayoutObject()
+                                    ->SlowFirstChild();
+  String text = "";
+  for (LayoutObject* obj = layout_object; obj; obj = obj->NextInPreOrder()) {
+    if (obj->IsText()) {
+      LayoutText* layout_text = ToLayoutText(obj);
+      text = layout_text->GetText();
+      break;
+    }
+  }
+  EXPECT_EQ("foo alt", text.Utf8());
+}
+
 }  // namespace blink