Upstream Chrome on iOS source code [9/11].

ios/chrome/browser/ui/tabs/target_frame_cache.mm

+// 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 "ios/chrome/browser/ui/tabs/target_frame_cache.h"
+
+TargetFrameCache::TargetFrameCache() {}
+
+TargetFrameCache::~TargetFrameCache() {}
+
+void TargetFrameCache::AddFrame(UIView* view, CGRect frame) {
+  targetFrames_[view] = frame;
+}
+
+void TargetFrameCache::RemoveFrame(UIView* view) {
+  targetFrames_.erase(view);
+}
+
+CGRect TargetFrameCache::GetFrame(UIView* view) {
+  std::map<UIView*, CGRect>::iterator it = targetFrames_.find(view);
+  if (it != targetFrames_.end())
+    return it->second;
+
+  return CGRectZero;
+}
+
+bool TargetFrameCache::HasFrame(UIView* view) {
+  return targetFrames_.find(view) != targetFrames_.end();
+}