Plugs in the new thumbnailing algorithm to ThumbnailTabHelper.

chrome/browser/thumbnails/thumbnailing_context.cc

Index: chrome/browser/thumbnails/thumbnailing_context.cc
diff --git a/chrome/browser/thumbnails/thumbnailing_context.cc b/chrome/browser/thumbnails/thumbnailing_context.cc
index 637df192ac1a2491bfed03dc11ee16edfb3a1dad..2457ebbdaef91ad49177ab5225ef2c517c1a8314 100644
--- a/chrome/browser/thumbnails/thumbnailing_context.cc
+++ b/chrome/browser/thumbnails/thumbnailing_context.cc
@@ -19,6 +19,10 @@ ThumbnailingContext::ThumbnailingContext(content::WebContents* web_contents,
   score.load_completed = !web_contents->IsLoading() && !load_interrupted;
 }
 
+ThumbnailingContext::ThumbnailingContext()
+  : clip_result(CLIP_RESULT_UNPROCESSED) {
+}
+
 ThumbnailingContext::~ThumbnailingContext() {
 }