[ios clean] Refactors ToolsMenu and Tabs presentation

ios/clean/chrome/browser/ui/tools/tools_menu_transition_controller.h

Index: ios/clean/chrome/browser/ui/tools/tools_menu_transition_controller.h
diff --git a/ios/clean/chrome/browser/ui/tools/tools_menu_transition_controller.h b/ios/clean/chrome/browser/ui/tools/tools_menu_transition_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..c1da071a0c7b796fd2c17de426c2110ba6ee2488
--- /dev/null
+++ b/ios/clean/chrome/browser/ui/tools/tools_menu_transition_controller.h
@@ -0,0 +1,25 @@
+// Copyright 2017 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_CLEAN_CHROME_BROWSER_UI_TOOLS_TOOLS_MENU_TRANSITION_CONTROLLER_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_TOOLS_TOOLS_MENU_TRANSITION_CONTROLLER_H_
+
+#import "ios/clean/chrome/browser/ui/animators/zoom_transition_controller.h"
+
+@protocol ToolsMenuCommands;
+
+// Transition delegate object for the ToolsMenuVC which inherits from

[marq (ping after 24h), 2017/06/23 09:18:49]

I'd avoid mention of the specific view controller class here, since that can
vary independently of this class.

I was thinking that this class could be genericized to be a
'ZoomingMenuTransitionController' without specifically coupling it to the tools
menu at all, except it depends on ToolsMenuCommands to dismiss things. 

[sczs, 2017/06/23 14:50:20]

Acknowledged.

+// ZoomTransitionController. It conforms to the
+// UIViewControllerTransitioningDelegate protocol and provides the ToolsMenuVC
+// with MenuPresentationController as a UIPresentationController. This object
+// drives the animation and frame of the presented ToolsMenuVC.
+@interface ToolsMenuTransitionController : ZoomTransitionController
+
+// A dispatcher is needed in order to close the presented ToolsMenuVC.
+- (instancetype)initWithDispatcher:(id<ToolsMenuCommands>)dispatcher;
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_TOOLS_TOOLS_MENU_TRANSITION_CONTROLLER_H_