exhibit 1: explicit null checks

chrome/browser/instant/instant_controller.cc

Index: chrome/browser/instant/instant_controller.cc
diff --git a/chrome/browser/instant/instant_controller.cc b/chrome/browser/instant/instant_controller.cc
index 6133e45715c52918198fc2d6094e374107683ec0..b67ea07d1a0755fba1aa05df5caf4130f874ac63 100644
--- a/chrome/browser/instant/instant_controller.cc
+++ b/chrome/browser/instant/instant_controller.cc
@@ -290,11 +290,11 @@ TabContents* InstantController::ReleasePreviewContents(InstantCommitType type) {
     FaviconService* favicon_service =
         preview->profile()->GetFaviconService(Profile::EXPLICIT_ACCESS);
     if (favicon_service && entry->GetFavicon().valid &&
-        entry->GetFavicon().image.IsEmpty()) {
+        !entry->GetFavicon().image.IsEmpty()) {
       std::vector<unsigned char> image_data;
       // TODO: Add all variants once the history service supports it.
       gfx::PNGCodec::EncodeBGRASkBitmap(
-          entry->GetFavicon().image.AsBitmap(), false, &image_data);
+          *entry->GetFavicon().image.ToSkBitmap(), false, &image_data);
       favicon_service->SetFavicon(entry->GetURL(),
                                   entry->GetFavicon().url,
                                   image_data,