[Mac] Line up omnibox popup under field.

chrome/browser/autocomplete/autocomplete_popup_view_mac.mm

 // Copyright (c) 2009 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 "chrome/browser/autocomplete/autocomplete_popup_view_mac.h"
 
 #include "app/resource_bundle.h"
 #include "app/text_elider.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/autocomplete/autocomplete_edit_view_mac.h"
 #include "chrome/browser/autocomplete/autocomplete_popup_model.h"
 #include "chrome/browser/bubble_positioner.h"
 #include "chrome/browser/cocoa/event_utils.h"
 #include "gfx/rect.h"
 #include "grit/theme_resources.h"
 #import "third_party/GTM/AppKit/GTMNSAnimation+Duration.h"
+#import "third_party/GTM/AppKit/GTMNSBezierPath+RoundRect.h"
 
 namespace {
 
 // The size delta between the font used for the edit and the result
 // rows.
 const int kEditFontAdjust = -1;
 
 // How much to adjust the cell sizing up from the default determined
 // by the font.
 const int kCellHeightAdjust = 7.0;
 
 // How to round off the popup's corners.  Goal is to match star and go
 // buttons.
 const CGFloat kPopupRoundingRadius = 3.5;
 
 // Gap between the field and the popup.
-const CGFloat kPopupFieldGap = 2.0;
+const CGFloat kPopupFieldGap = 0.0;
 
 // How opaque the popup window should be.  This matches Windows (see
 // autocomplete_popup_contents_view.cc, kGlassPopupTransparency).
 const CGFloat kPopupAlpha = 240.0 / 255.0;
 
 // How much space to leave for the left and right margins.
 const CGFloat kLeftRightMargin = 8.0;
 
 // How far to offset the text column from the left.
 const CGFloat kTextXOffset = 33.0;
@@ skipping 613 matching lines @@
   return -1;
 }
 
 - (BOOL)isOpaque {
   return NO;
 }
 
 // This handles drawing the decorations of the rounded popup window,
 // calling on NSMatrix to draw the actual contents.
 - (void)drawRect:(NSRect)rect {
+  // Apparently this expects flipped coordinates, because in order to
+  // round the bottom corners visually, I need to specify the top
+  // corners here.
   NSBezierPath* path =
-      [NSBezierPath bezierPathWithRoundedRect:[self bounds]
-                                      xRadius:kPopupRoundingRadius
-                                      yRadius:kPopupRoundingRadius];
+     [NSBezierPath gtm_bezierPathWithRoundRect:[self bounds]
+                           topLeftCornerRadius:kPopupRoundingRadius
+                          topRightCornerRadius:kPopupRoundingRadius
+                        bottomLeftCornerRadius:0.0
+                       bottomRightCornerRadius:0.0];
 
   // Draw the matrix clipped to our border.
   [NSGraphicsContext saveGraphicsState];
   [path addClip];
   [super drawRect:rect];
   [NSGraphicsContext restoreGraphicsState];
 }
 
 @end