alternate ntp: implement searchbox api for instant overlay to adopt themes

chrome/browser/instant/instant_controller.cc

 // Copyright 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/instant/instant_controller.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 508 matching lines @@
       model_.mode().is_search_suggestions())
     Hide(false);
 }
 
 void InstantController::SetInstantEnabled(bool instant_enabled) {
   instant_enabled_ = instant_enabled;
   if (!extended_enabled_ && !instant_enabled_)
     DeleteLoader();
 }
 
+void InstantController::ThemeChanged(const ThemeBackgroundInfo& theme_info) {
+  if (GetPreviewContents())
+    loader_->SendThemeBackgroundInfo(theme_info);
+}
+
+void InstantController::ThemeAreaHeightChanged(int height) {
+  if (GetPreviewContents())
+    loader_->SendThemeAreaHeight(height);
+}
+
 void InstantController::SetSuggestions(
     InstantLoader* loader,
     const std::vector<InstantSuggestion>& suggestions) {
   DVLOG(1) << "SetSuggestions";
   if (loader_ != loader || !search_mode_.is_search_suggestions())
     return;
 
   InstantSuggestion suggestion;
   if (!suggestions.empty())
     suggestion = suggestions[0];
@@ skipping 99 matching lines @@
   if (!GetInstantURL(template_url, &instant_url))
     return false;
 
   if (GetPreviewContents() && loader_->instant_url() != instant_url)
     DeleteLoader();
 
   if (!GetPreviewContents()) {
     loader_.reset(new InstantLoader(this, instant_url, active_tab));
     loader_->Init();
 
-    // Ensure the searchbox API has the correct context.
+    // Ensure the searchbox API has the correct theme-related info and context.
+    browser_->UpdateThemeInfoForPreview();
     if (extended_enabled_)
       loader_->OnActiveTabModeChanged(search_mode_.is_ntp());
 
     // Reset the loader timer.
     stale_loader_timer_.Start(
         FROM_HERE,
         base::TimeDelta::FromMilliseconds(kStaleLoaderTimeoutMS), this,
         &InstantController::OnStaleLoader);
   }
 
@@ skipping 168 matching lines @@
   }
 
   std::map<std::string, int>::const_iterator iter =
       blacklisted_urls_.find(*instant_url);
   if (iter != blacklisted_urls_.end() &&
       iter->second > kMaxInstantSupportFailures)
     return false;
 
   return true;
 }