Run ContentMain in a browser_test's browser process. This removes duplication of code in the browse…

ash/drag_drop/drag_drop_interactive_uitest.cc

 // Copyright (c) 2013 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 "ash/drag_drop/drag_drop_controller.h"
 
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/test/ui_controls.h"
+#include "ui/gl/gl_surface.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 namespace internal {
 namespace {
 
 class DraggableView : public views::View {
  public:
   DraggableView() {}
@@ skipping 86 matching lines @@
 }
 
 void DragDropAcrossMultiDisplay_Step1() {
   ui_controls::SendMouseEventsNotifyWhenDone(
       ui_controls::LEFT, ui_controls::DOWN,
       base::Bind(&DragDropAcrossMultiDisplay_Step2));
 }
 
 }  // namespace
 
-typedef test::AshTestBase DragDropTest;
+class DragDropTest : public test::AshTestBase {
+ public:
+  DragDropTest() {}
+  virtual ~DragDropTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    gfx::GLSurface::InitializeOneOffForTests();

[sky, 2014/03/14 21:35:56]

Is there a reason you don't want to move this to AshTestBase?

[jam, 2014/03/14 22:35:40]

yeah, it won't work because this test base class runs in both unit test and
browser test binaries. In the former, the environment already calls this method.
if i put it in the base, it would be called twice which fails.

+    test::AshTestBase::SetUp();
+  }
+};
 
 #if defined(OS_WIN)
 #define MAYBE_DragDropAcrossMultiDisplay DISABLED_DragDropAcrossMultiDisplay
 #else
 #define MAYBE_DragDropAcrossMultiDisplay DragDropAcrossMultiDisplay
 #endif
 
 // Test if the mouse gets moved properly to another display
 // during drag & drop operation.
 TEST_F(DragDropTest, MAYBE_DragDropAcrossMultiDisplay) {
@@ skipping 24 matching lines @@
   base::MessageLoop::current()->Run();
 
   EXPECT_TRUE(target_view->dropped());
 
   source->Close();
   target->Close();
 }
 
 }  // namespace internal
 }  // namespace ash