[Local NTP] Fixing thumbnail aspect ratio, and store taller thumbnails.

chrome/browser/thumbnails/thumbnail_service_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/thumbnails/thumbnail_service_impl.h"
 
 #include "base/command_line.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/time/time.h"
 #include "chrome/browser/history/history_service.h"
 #include "chrome/browser/thumbnails/content_based_thumbnailing_algorithm.h"
 #include "chrome/browser/thumbnails/simple_thumbnail_crop.h"
 #include "chrome/browser/thumbnails/thumbnailing_context.h"
 #include "chrome/common/chrome_switches.h"
 #include "components/search/search.h"
 #include "url/gurl.h"
 
 using content::BrowserThread;
 
 namespace {
 
 // The thumbnail size in DIP.
 const int kThumbnailWidth = 212;
-const int kThumbnailHeight = 132;
+const int kThumbnailHeight = 142;
 
 // True if thumbnail retargeting feature is enabled (Finch/flags).
 bool IsThumbnailRetargetingEnabled() {
   if (!chrome::IsInstantExtendedAPIEnabled())
     return false;
 
   return CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableThumbnailRetargeting);
 }
 
@@ skipping 83 matching lines @@
 }
 
 void ThumbnailServiceImpl::ShutdownOnUIThread() {
   // Since each call uses its own scoped_refptr, we can just clear the reference
   // here by assigning null. If another call is completed, it added its own
   // reference.
   top_sites_ = NULL;
 }
 
 }  // namespace thumbnails