Convert OSX intent picker unit tests to PlatformTests.

chrome/browser/ui/cocoa/web_intent_picker_test_base.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 "web_intent_picker_test_base.h"
-
-#include "chrome/browser/ui/cocoa/web_intent_picker_cocoa.h"
-#import "chrome/browser/ui/cocoa/web_intent_sheet_controller.h"
-
-MockIntentPickerDelegate::MockIntentPickerDelegate() {
-}
-
-MockIntentPickerDelegate::~MockIntentPickerDelegate() {
-}
-
-WebIntentPickerTestBase::WebIntentPickerTestBase() {
-}
-
-WebIntentPickerTestBase::~WebIntentPickerTestBase() {
-}
-
-void WebIntentPickerTestBase::CreateBubble(TabContentsWrapper* wrapper)
-{
-  picker_.reset(new WebIntentPickerCocoa(NULL, wrapper, &delegate_, &model_));
-
-  controller_ =
-     [[WebIntentPickerSheetController alloc] initWithPicker:picker_.get()];
-  window_ = [controller_ window];
-  [controller_ showWindow:nil];
-}