Prepare ui/ module for compilation with OS X 10.7 deployment target.

ui/snapshot/snapshot_mac.mm

 // 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 "ui/snapshot/snapshot.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/task_runner.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/image/image.h"
 
 namespace ui {
 
 bool GrabViewSnapshot(gfx::NativeView view,
                       std::vector<unsigned char>* png_representation,
                       const gfx::Rect& snapshot_bounds) {
   NSWindow* window = [view window];
   NSScreen* screen = [[NSScreen screens] firstObject];
   gfx::Rect screen_bounds = gfx::Rect(NSRectToCGRect([screen frame]));
 
 
   // Get the view bounds relative to the screen
   NSRect frame = [view convertRect:[view bounds] toView:nil];
-  frame.origin = [window convertBaseToScreen:frame.origin];
+  frame.origin = [window convertRectToScreen:frame].origin;

[Avi (use Gerrit), 2016/03/08 20:07:54]

Just do

frame = [window convertRectToScreen:frame];

and let the system method do its job.

[erikchen, 2016/03/08 20:57:41]

Done.

 
   gfx::Rect view_bounds = gfx::Rect(NSRectToCGRect(frame));
 
   // Flip window coordinates based on the primary screen.
   view_bounds.set_y(
       screen_bounds.height() - view_bounds.y() - view_bounds.height());
 
   // Convert snapshot bounds relative to window into bounds relative to
   // screen.
   gfx::Rect screen_snapshot_bounds = snapshot_bounds;
@@ skipping 55 matching lines @@
 void GrabWindowSnapshotAsync(
     gfx::NativeWindow window,
     const gfx::Rect& source_rect,
     scoped_refptr<base::TaskRunner> background_task_runner,
     const GrabWindowSnapshotAsyncPNGCallback& callback) {
   return GrabViewSnapshotAsync([[window contentView] superview], source_rect,
       background_task_runner, callback);
 }
 
 }  // namespace ui