[Home] Use white doodle background when Chrome Home is enabled

ios/chrome/browser/google/google_logo_service.mm

 // Copyright 2014 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 "ios/chrome/browser/google/google_logo_service.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/bind.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 93 matching lines @@
         web::WebThread::GetTaskRunnerForThread(web::WebThread::FILE),
         web::WebThread::GetBlockingPool(), browser_state_->GetRequestContext(),
         std::unique_ptr<search_provider_logos::LogoDelegate>(
             new IOSChromeLogoDelegate())));
   }
 
   logo_tracker_->SetServerAPI(
       GetGoogleDoodleURL(browser_state_),
       base::Bind(&search_provider_logos::GoogleParseLogoResponse),
       base::Bind(&search_provider_logos::GoogleAppendQueryparamsToLogoURL),
-      true, false /* transparent */);
+      true, false /* gray_background */);
   logo_tracker_->GetLogo(observer);
 }
 
 void GoogleLogoService::SetCachedLogo(const search_provider_logos::Logo* logo) {
   if (logo) {
     if (cached_metadata_.fingerprint == logo->metadata.fingerprint) {
       return;
     }
     logo->image.deepCopyTo(&cached_image_);
     cached_metadata_ = logo->metadata;
   } else {
     cached_image_ = SkBitmap();
     cached_metadata_ = empty_metadata;
   }
 }
 
 search_provider_logos::Logo GoogleLogoService::GetCachedLogo() {
   search_provider_logos::Logo logo;
   logo.image = cached_image_;
   logo.metadata = cached_metadata_;
   return logo;
 }