Update bool WindowManager::OnWmSetBounds() to match with its desirable behavior.

services/ui/public/cpp/window_manager_delegate.h

Index: services/ui/public/cpp/window_manager_delegate.h
diff --git a/services/ui/public/cpp/window_manager_delegate.h b/services/ui/public/cpp/window_manager_delegate.h
index 2f724fc877fe9646be6ea52adc7f75ce30ea7b8d..3b0f6301f0cd0162d99f7d48b741731b4bce22f0 100644
--- a/services/ui/public/cpp/window_manager_delegate.h
+++ b/services/ui/public/cpp/window_manager_delegate.h
@@ -76,7 +76,7 @@ class WindowManagerDelegate {
   // indicates the change is not allowed.
   // NOTE: This should not change the bounds of |window|. Instead return the
   // bounds the window should be in |bounds|.
-  virtual bool OnWmSetBounds(Window* window, gfx::Rect* bounds) = 0;
+  virtual void OnWmSetBounds(Window* window, gfx::Rect* bounds) = 0;
 
   // A client requested the shared property named |name| to change to
   // |new_data|. Return true to allow the change to |new_data|, false