Add core plumbing for Instant Extended work

chrome/browser/ui/search/search_ui.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/ui/search/search_ui.h"
+
+namespace chrome {
+namespace search {
+
+const SkColor kNTPBackgroundColor = SkColorSetRGB(0xF5, 0xF5, 0xF5);
+const SkColor kResultsSeparatorColor = SkColorSetRGB(226, 226, 226);
+const SkColor kSearchBackgroundColor = SK_ColorWHITE;
+
+const int kOmniboxYPosition = 310;
+const int kSearchResultsHeight = 122;
+
+gfx::Rect GetNTPOmniboxBounds(const gfx::Size& web_contents_size) {
+  const double kNTPPageWidthRatio = 0.73f;
+  if (web_contents_size.IsEmpty())
+    return gfx::Rect();
+  int width = static_cast<int>(kNTPPageWidthRatio *
+                               static_cast<double>(web_contents_size.width()));
+  int x = (web_contents_size.width() - width) / 2;
+  return gfx::Rect(x, kOmniboxYPosition, width, 0);
+}
+
+} //  namespace search
+} //  namespace chrome