Cleanup: IWYU for base/gtest_prod_util.h.

ash/wm/workspace/workspace_window_resizer.h

Index: ash/wm/workspace/workspace_window_resizer.h
diff --git a/ash/wm/workspace/workspace_window_resizer.h b/ash/wm/workspace/workspace_window_resizer.h
index 8bf065710df4b7d21242eb2167ee8dc1a25a995e..7a80566ef039ad464e50bc86d17a75eac67c036e 100644
--- a/ash/wm/workspace/workspace_window_resizer.h
+++ b/ash/wm/workspace/workspace_window_resizer.h
@@ -2,15 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_WM_WORKSPACE_WINDOW_RESIZER_H_
-#define ASH_WM_WORKSPACE_WINDOW_RESIZER_H_
+#ifndef ASH_WM_WORKSPACE_WORKSPACE_WINDOW_RESIZER_H_
+#define ASH_WM_WORKSPACE_WORKSPACE_WINDOW_RESIZER_H_
 
 #include <vector>
 
 #include "ash/wm/window_resizer.h"
 #include "ash/wm/workspace/magnetism_matcher.h"
 #include "base/compiler_specific.h"
-#include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/aura/window_tracker.h"
@@ -91,7 +90,7 @@ class ASH_EXPORT WorkspaceWindowResizer : public WindowResizer {
   // Divides |amount| evenly between |sizes|. If |amount| is negative it
   // indicates how many pixels |sizes| should be shrunk by.
   // Returns how many pixels failed to be allocated/removed from |sizes|.
-  int GrowFairly(int amount, std::vector<WindowSize>& sizes) const;
+  int GrowFairly(int amount, std::vector<WindowSize>* sizes) const;
 
   // Calculate the ratio of pixels that each WindowSize in |sizes| should
   // receive when growing or shrinking.
@@ -223,4 +222,4 @@ class ASH_EXPORT WorkspaceWindowResizer : public WindowResizer {
 
 }  // namespace ash
 
-#endif  // ASH_WM_WORKSPACE_WINDOW_RESIZER_H_
+#endif  // ASH_WM_WORKSPACE_WORKSPACE_WINDOW_RESIZER_H_