Implement fullscreen info bubble on Win and Mac

chrome/browser/ui/cocoa/info_bubble_view.mm

 // Copyright (c) 2011 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.
 
 #import "chrome/browser/ui/cocoa/info_bubble_view.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_nsobject.h"
 
 @implementation InfoBubbleView
 
 @synthesize arrowLocation = arrowLocation_;
 
 - (id)initWithFrame:(NSRect)frameRect {
   if ((self = [super initWithFrame:frameRect])) {
     arrowLocation_ = info_bubble::kTopLeft;
   }
   return self;
 }
 
 - (void)drawRect:(NSRect)rect {
   // Make room for the border to be seen.
   NSRect bounds = [self bounds];
-  bounds.size.height -= info_bubble::kBubbleArrowHeight;
+  if (arrowLocation_ != info_bubble::kNoArrow) {
+    bounds.size.height -= info_bubble::kBubbleArrowHeight;
+  }
   NSBezierPath* bezier = [NSBezierPath bezierPath];
   rect.size.height -= info_bubble::kBubbleArrowHeight;
 
   // Start with a rounded rectangle.
   [bezier appendBezierPathWithRoundedRect:bounds
                                   xRadius:info_bubble::kBubbleCornerRadius
                                   yRadius:info_bubble::kBubbleCornerRadius];
 
   // Add the bubble arrow.
   CGFloat dX = 0;
   switch (arrowLocation_) {
     case info_bubble::kTopLeft:
       dX = info_bubble::kBubbleArrowXOffset;
       break;
     case info_bubble::kTopRight:
       dX = NSWidth(bounds) - info_bubble::kBubbleArrowXOffset -
           info_bubble::kBubbleArrowWidth;
       break;
+    case info_bubble::kNoArrow:
+      break;
     default:
       NOTREACHED();
       break;
   }
   NSPoint arrowStart = NSMakePoint(NSMinX(bounds), NSMaxY(bounds));
   arrowStart.x += dX;
   [bezier moveToPoint:NSMakePoint(arrowStart.x, arrowStart.y)];
-  [bezier lineToPoint:NSMakePoint(arrowStart.x +
-                                      info_bubble::kBubbleArrowWidth / 2.0,
-                                  arrowStart.y +
-                                      info_bubble::kBubbleArrowHeight)];
+  if (arrowLocation_ != info_bubble::kNoArrow) {
+    [bezier lineToPoint:NSMakePoint(arrowStart.x +
+                                        info_bubble::kBubbleArrowWidth / 2.0,
+                                    arrowStart.y +
+                                        info_bubble::kBubbleArrowHeight)];
+  }
   [bezier lineToPoint:NSMakePoint(arrowStart.x + info_bubble::kBubbleArrowWidth,
                                   arrowStart.y)];
   [bezier closePath];
   [[NSColor whiteColor] set];
   [bezier fill];
 }
 
 - (NSPoint)arrowTip {
   NSRect bounds = [self bounds];
   CGFloat tipXOffset =
       info_bubble::kBubbleArrowXOffset + info_bubble::kBubbleArrowWidth / 2.0;
   CGFloat xOffset =
       (arrowLocation_ == info_bubble::kTopRight) ? NSMaxX(bounds) - tipXOffset :
                                                    NSMinX(bounds) + tipXOffset;
   NSPoint arrowTip = NSMakePoint(xOffset, NSMaxY(bounds));
   return arrowTip;
 }
 
 @end