[Extensions Mac] Implement developer mode warning on mac

chrome/browser/ui/cocoa/extensions/browser_actions_container_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/extensions/browser_actions_container_view.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
+#include "grit/theme_resources.h"
+#include "ui/base/cocoa/appkit_utils.h"
 
 NSString* const kBrowserActionGrippyDragStartedNotification =
     @"BrowserActionGrippyDragStartedNotification";
 NSString* const kBrowserActionGrippyDraggingNotification =
     @"BrowserActionGrippyDraggingNotification";
 NSString* const kBrowserActionGrippyDragFinishedNotification =
     @"BrowserActionGrippyDragFinishedNotification";
 NSString* const kBrowserActionsContainerWillAnimate =
     @"BrowserActionsContainerWillAnimate";
 NSString* const kBrowserActionsContainerMouseEntered =
@@ skipping 43 matching lines @@
   }
   return self;
 }
 
 - (void)dealloc {
   if (trackingArea_.get())
     [self removeTrackingArea:trackingArea_.get()];
   [super dealloc];
 }
 
+- (void)drawRect:(NSRect)rect {
+  [super drawRect:rect];
+  if (isHighlighting_) {
+    ui::NinePartImageIds imageIds = IMAGE_GRID(IDR_DEVELOPER_MODE_HIGHLIGHT);
+    ui::DrawNinePartImage(
+        [self bounds], imageIds, NSCompositeSourceOver, 1.0, true);
+  }
+}
+
 - (void)setTrackingEnabled:(BOOL)enabled {
   if (enabled) {
     trackingArea_.reset(
         [[CrTrackingArea alloc] initWithRect:NSZeroRect
                                      options:NSTrackingMouseEnteredAndExited |
                                              NSTrackingActiveInActiveApp |
                                              NSTrackingInVisibleRect
                                        owner:self
                                     userInfo:nil]);
     [self addTrackingArea:trackingArea_.get()];
   } else if (trackingArea_.get()) {
     [self removeTrackingArea:trackingArea_.get()];
     [trackingArea_.get() clearOwner];
     trackingArea_.reset(nil);
   }
 }
 
+- (void)setIsHighlighting:(BOOL)isHighlighting {
+  if (isHighlighting != isHighlighting_) {
+    isHighlighting_ = isHighlighting;
+    [self setNeedsDisplay:YES];
+  }
+}
+
 - (void)setResizable:(BOOL)resizable {
   if (resizable == resizable_)
     return;
   resizable_ = resizable;
   [self setNeedsDisplay:YES];
 }
 
 - (BOOL)isResizable {
   return resizable_;
 }
@@ skipping 156 matching lines @@
     retVal = [NSCursor resizeLeftRightCursor];
   }
   return retVal;
 }
 
 - (CGFloat)maxAllowedWidth {
   return delegate_ ? delegate_->GetMaxAllowedWidth() : CGFLOAT_MAX;
 }
 
 @end