[iOS] Upstream //ios/chrome/browser/ui

ios/chrome/browser/ui/background_generator.h

+// 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_BACKGROUND_GENERATOR_H_
+#define IOS_CHROME_BROWSER_UI_BACKGROUND_GENERATOR_H_
+
+#include <UIKit/UIKit.h>
+
+// Returns a UIImage of size |backgroundRect| with a radial gradient image at
+// |centerPoint| and radiates outwards to a radius of |radius|. The gradient
+// starts from |centerColor| at |centerPoint| to |outsideColor| at the end of
+// |radius|. |tileImage| is tiled over the entire image and |logoImage| is
+// rendered at |centerPoint|.
+// |tileImage| and |logoImage| may be nil.
+UIImage* GetRadialGradient(CGRect backgroundRect,
+                           CGPoint centerPoint,
+                           CGFloat radius,
+                           CGFloat centerColor,
+                           CGFloat outsideColor,
+                           UIImage* tileImage,
+                           UIImage* logoImage);
+
+// Installs the stack view/empty tab view background in |view|.
+void InstallBackgroundInView(UIView* view);
+
+#endif  // IOS_CHROME_BROWSER_UI_BACKGROUND_GENERATOR_H_