[Icons NTP] Make largeIconUrl and fallbackIconUrl available for Local NTP, behind flag.

chrome/renderer/searchbox/searchbox_extension.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/renderer/searchbox/searchbox_extension.h"
 
 #include "base/i18n/rtl.h"
 #include "base/json/string_escape.h"
+#include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/instant_types.h"
 #include "chrome/common/ntp_logging_events.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/renderer_resources.h"
 #include "chrome/renderer/searchbox/searchbox.h"
 #include "components/crx_file/id_util.h"
@@ skipping 35 matching lines @@
 
 const char kLTRHtmlTextDirection[] = "ltr";
 const char kRTLHtmlTextDirection[] = "rtl";
 
 // Converts a V8 value to a string16.
 base::string16 V8ValueToUTF16(v8::Handle<v8::Value> v) {
   v8::String::Value s(v);
   return base::string16(reinterpret_cast<const base::char16*>(*s), s.length());
 }
 
+// Returns whether we should use large icons on NTP.
+bool IsIconNTPEnabled() {
+  return StartsWithASCII(base::FieldTrialList::FindFullName("IconNTP"),
+                         "Enabled", true);
+}
+
 // Converts string16 to V8 String.
 v8::Handle<v8::String> UTF16ToV8String(v8::Isolate* isolate,
                                        const base::string16& s) {
   return v8::String::NewFromTwoByte(isolate,
                                     reinterpret_cast<const uint16_t*>(s.data()),
                                     v8::String::kNormalString,
                                     s.size());
 }
 
 // Converts std::string to V8 String.
@@ skipping 18 matching lines @@
 v8::Handle<v8::String> GenerateThumbnailURL(
     v8::Isolate* isolate,
     int render_view_id,
     InstantRestrictedID most_visited_item_id) {
   return UTF8ToV8String(
       isolate,
       base::StringPrintf(
           "chrome-search://thumb/%d/%d", render_view_id, most_visited_item_id));
 }
 
+v8::Handle<v8::String> GenerateLargeIconURL(
+    v8::Isolate* isolate,
+    int render_view_id,
+    InstantRestrictedID most_visited_item_id) {
+  const int kIconSize = 96;  // To support high DPI; on screen it's 48 dp.
+  return UTF8ToV8String(
+      isolate,
+      base::StringPrintf("chrome-search://large-icon/%d/%d/%d",
+                         kIconSize, render_view_id, most_visited_item_id));
+}
+
+v8::Handle<v8::String> GenerateFallbackIconURL(
+    v8::Isolate* isolate,
+    int render_view_id,
+    InstantRestrictedID most_visited_item_id) {
+  return UTF8ToV8String(
+      isolate,
+      base::StringPrintf("chrome-search://fallback-icon/,,,,1/%d/%d",
+                         render_view_id, most_visited_item_id));
+}
+
 // Populates a Javascript MostVisitedItem object from |mv_item|.
 // NOTE: Includes "url", "title" and "domain" which are private data, so should
 // not be returned to the Instant page. These should be erased before returning
 // the object. See GetMostVisitedItemsWrapper() in searchbox_api.js.
 v8::Handle<v8::Object> GenerateMostVisitedItem(
     v8::Isolate* isolate,
     int render_view_id,
     InstantRestrictedID restricted_id,
     const InstantMostVisitedItem& mv_item) {
   // We set the "dir" attribute of the title, so that in RTL locales, a LTR
@@ skipping 17 matching lines @@
   if (title.empty())
     title = base::UTF8ToUTF16(mv_item.url.spec());
 
   v8::Handle<v8::Object> obj = v8::Object::New(isolate);
   obj->Set(v8::String::NewFromUtf8(isolate, "renderViewId"),
            v8::Int32::New(isolate, render_view_id));
   obj->Set(v8::String::NewFromUtf8(isolate, "rid"),
            v8::Int32::New(isolate, restricted_id));
   obj->Set(v8::String::NewFromUtf8(isolate, "thumbnailUrl"),
            GenerateThumbnailURL(isolate, render_view_id, restricted_id));
+  if (IsIconNTPEnabled()) {
+    // Update website http://www.chromium.org/embeddedsearch when we make this
+    // permanent.
+    obj->Set(v8::String::NewFromUtf8(isolate, "largeIconUrl"),
+             GenerateLargeIconURL(isolate, render_view_id, restricted_id));
+    obj->Set(v8::String::NewFromUtf8(isolate, "fallbackIconUrl"),
+             GenerateFallbackIconURL(isolate, render_view_id, restricted_id));
+  }
   obj->Set(v8::String::NewFromUtf8(isolate, "title"),
            UTF16ToV8String(isolate, title));
   obj->Set(v8::String::NewFromUtf8(isolate, "domain"),
            UTF8ToV8String(isolate, mv_item.url.host()));
   obj->Set(v8::String::NewFromUtf8(isolate, "direction"),
            UTF8ToV8String(isolate, direction));
   obj->Set(v8::String::NewFromUtf8(isolate, "url"),
            UTF8ToV8String(isolate, mv_item.url.spec()));
   return obj;
 }
@@ skipping 1095 matching lines @@
   if (!render_view) return;
 
   bool display_instant_results =
       SearchBox::Get(render_view)->display_instant_results();
   DVLOG(1) << render_view << " GetDisplayInstantResults" <<
       display_instant_results;
   args.GetReturnValue().Set(display_instant_results);
 }
 
 }  // namespace extensions_v8