Adjust test expectations for infinite-size images.

content/shell/renderer/layout_test/blink_test_runner.cc

Index: content/shell/renderer/layout_test/blink_test_runner.cc
diff --git a/content/shell/renderer/layout_test/blink_test_runner.cc b/content/shell/renderer/layout_test/blink_test_runner.cc
index 76af0616fe51b6069d86bda1221e5dd23d7a1d0c..5100af116554847d6c07ce1f7991f7e3bcd0178d 100644
--- a/content/shell/renderer/layout_test/blink_test_runner.cc
+++ b/content/shell/renderer/layout_test/blink_test_runner.cc
@@ -37,6 +37,7 @@
 #include "components/test_runner/web_test_interfaces.h"
 #include "components/test_runner/web_test_proxy.h"
 #include "components/test_runner/web_test_runner.h"
+#include "content/common/content_switches_internal.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/service_registry.h"
 #include "content/public/common/url_constants.h"
@@ -501,8 +502,10 @@ void BlinkTestRunner::SimulateWebNotificationClose(const std::string& title,
                                                           by_user));
 }
 
-void BlinkTestRunner::SetDeviceScaleFactor(float factor) {
-  content::SetDeviceScaleFactor(render_view(), factor);
+bool BlinkTestRunner::SetDeviceScaleFactor(float factor) {
+  RenderView* rv = render_view();
+  content::SetDeviceScaleFactor(rv, factor);
+  return IsUseZoomForDSFEnabled();
 }
 
 void BlinkTestRunner::EnableUseZoomForDSF() {