Revert 289224 "Update ui::CompositorObserver instrumentation"

trunk/src/ui/compositor/compositor_observer.cc

Index: trunk/src/ui/compositor/compositor_observer.cc
===================================================================
--- trunk/src/ui/compositor/compositor_observer.cc	(revision 289228)
+++ trunk/src/ui/compositor/compositor_observer.cc	(working copy)
@@ -8,17 +8,19 @@
 
 namespace ui {
 
-#if DCHECK_IS_ON
+#if defined(OS_MACOSX)
+// Debugging instrumentation for crbug.com/401630.
+// TODO(ccameron): remove this.
 CompositorObserver::CompositorObserver() : observing_count_(0) {}
 #else
 CompositorObserver::CompositorObserver() {}
 #endif
 
 CompositorObserver::~CompositorObserver() {
-  // TODO(ccameron): Make this check not fire on non-Mac platforms.
-  // http://crbug.com/403011
 #if defined(OS_MACOSX)
-  DCHECK_EQ(observing_count_, 0);
+  // Debugging instrumentation for crbug.com/401630.
+  // TODO(ccameron): remove this.
+  CHECK_EQ(observing_count_, 0);
 #endif
 }