Support multiple lines for status text on Chooser UI on Mac

chrome/browser/ui/cocoa/chooser_content_view_cocoa.h

 // Copyright 2016 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 CHROME_BROWSER_UI_COCOA_CHOOSER_CONTENT_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_CHOOSER_CONTENT_VIEW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
@@ skipping 14 matching lines @@
   base::scoped_nsobject<SpinnerView> spinner_;
   base::scoped_nsobject<NSTextField> status_;
   base::scoped_nsobject<NSButton> rescanButton_;
   base::scoped_nsobject<NSButton> connectButton_;
   base::scoped_nsobject<NSButton> cancelButton_;
   base::scoped_nsobject<NSBox> separator_;
   base::scoped_nsobject<NSTextField> message_;
   base::scoped_nsobject<NSButton> helpButton_;
   std::unique_ptr<ChooserController> chooserController_;
   std::unique_ptr<ChooserContentViewController> chooserContentViewController_;
+
+  CGFloat titleHeight_;
+  CGFloat statusHeight_;
+  CGFloat rescanButtonHeight_;
+  CGFloat connectButtonWidth_;
+  CGFloat connectButtonHeight_;
+  CGFloat cancelButtonWidth_;
+  CGFloat cancelButtonHeight_;
+  CGFloat messageHeight_;
+
+  struct FrameAndOrigin {
+    NSRect scroll_view_frame;
+    NSPoint connect_button_origin;
+    NSPoint cancel_button_origin;
+  };
+
+  // The cached |scrollView_| frame and |connectButton_| and |cancelButton_|
+  // origins for views layout:
+  // When |status_| is shown.
+  FrameAndOrigin statusShown_;
+  // When |rescanButton_| is shown.
+  FrameAndOrigin rescanButtonShown_;
+  // When neither |status_| nor |rescanButton_| is shown.
+  FrameAndOrigin noStatusOrRescanButtonShown_;
+
+  // The cached |status_| and |rescanButton_| origins.
+  NSPoint statusOrigin_;
+  NSPoint rescanButtonOrigin_;
 }
 
 // Designated initializer.
 - (instancetype)initWithChooserTitle:(NSString*)chooserTitle
                    chooserController:
                        (std::unique_ptr<ChooserController>)chooserController;
 
 // Creates the title for the chooser.
 - (base::scoped_nsobject<NSTextField>)createChooserTitle:(NSString*)title;
 
 // Creates a button with |title|.
 - (base::scoped_nsobject<NSButton>)createButtonWithTitle:(NSString*)title;
 
 // Creates the "Connect" button.
 - (base::scoped_nsobject<NSButton>)createConnectButton;
 
 // Creates the "Cancel" button.
 - (base::scoped_nsobject<NSButton>)createCancelButton;
 
 // Creates the separator.
 - (base::scoped_nsobject<NSBox>)createSeparator;
 
 // Creates a text field with |text|.
 - (base::scoped_nsobject<NSTextField>)createTextField:(NSString*)text;
 
 // Creates a hyperlink button with |text|.
 - (base::scoped_nsobject<NSButton>)createHyperlinkButtonWithText:
     (NSString*)text;
 
+// Calculates the frame for the |scrollView_|.
+- (NSRect)calculateScrollViewFrame:(CGFloat)buttonRowHeight;
+
+// Calculates the origin for the |status_| text.
+- (NSPoint)calculateStatusOrigin:(CGFloat)buttonRowHeight;
+
+// Calculates the origin for the "Re-scan" button.
+- (NSPoint)calculateRescanButtonOrigin:(CGFloat)buttonRowHeight;
+
+// Calculates the origin for the "Connect" button.
+- (NSPoint)calculateConnectButtonOrigin:(CGFloat)buttonRowHeight;
+
+// Calculates the origin for the "Cancel" button.
+- (NSPoint)calculateCancelButtonOrigin:(CGFloat)buttonRowHeight;
+
+// Updates the origin and size of the view.
+- (void)updateView;
+
 // Gets the table view for the chooser.
 - (NSTableView*)tableView;
 
 // Gets the spinner.
 - (SpinnerView*)spinner;
 
 // Gets the status text field.
 - (NSTextField*)status;
 
 // Gets the "Re-scan" button.
@@ skipping 28 matching lines @@
 
 // Called when "Re-scan" button is pressed.
 - (void)onRescan:(id)sender;
 
 // Called when the "Get help" button is pressed.
 - (void)onHelpPressed:(id)sender;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_CHOOSER_CONTENT_VIEW_COCOA_H_