Adds the contextMessage field to notifications.

chrome/browser/extensions/api/notifications/notifications_api.cc

 // 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 "chrome/browser/extensions/api/notifications/notifications_api.h"
 
 #include "base/callback.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
@@ skipping 266 matching lines @@
                                      &info.icon);
         optional_fields.buttons.push_back(info);
       }
     }
 
     if (options->expanded_message.get()) {
       optional_fields.expanded_message =
           UTF8ToUTF16(*options->expanded_message);
     }
 
+    if (options->context_message)
+      optional_fields.context_message = UTF8ToUTF16(*options->context_message);
+
     bool has_image = NotificationBitmapToGfxImage(options->image_bitmap.get(),
                                                   &optional_fields.image);
     // We should have an image if and only if the type is an image type.
     if (has_image != (type == message_center::NOTIFICATION_TYPE_IMAGE))
       return false;
 
     // We should have list items if and only if the type is a multiple type.
     bool has_list_items = options->items.get() && options->items->size() > 0;
     if (has_list_items != (type == message_center::NOTIFICATION_TYPE_MULTIPLE))
       return false;
@@ skipping 80 matching lines @@
 
       for (size_t i = 0; i < number_of_buttons; i++) {
         message_center::ButtonInfo info(
             UTF8ToUTF16((*options->buttons)[i]->title));
         NotificationBitmapToGfxImage((*options->buttons)[i]->icon_bitmap.get(),
                                      &info.icon);
         optional_fields.buttons.push_back(info);
       }
     }
 
+    if (options->context_message)
+      notification->set_context_message(UTF8ToUTF16(*options->context_message));
+
     if (options->expanded_message) {
       notification->set_expanded_message(
           UTF8ToUTF16(*options->expanded_message));
     }
 
     gfx::Image image;
     if (NotificationBitmapToGfxImage(options->image_bitmap.get(), &image)) {
       // We should have an image if and only if the type is an image type.
       if (notification->type() != message_center::NOTIFICATION_TYPE_IMAGE)
         return false;
@@ skipping 186 matching lines @@
         StripScopeFromIdentifier(extension_->id(), *iter), true);
   }
 
   SetResult(result.release());
   SendResponse(true);
 
   return true;
 }
 
 }  // namespace extensions