Revert of Always create top controls manager

cc/base/switches.cc

Index: cc/base/switches.cc
diff --git a/cc/base/switches.cc b/cc/base/switches.cc
index ae424824611ea9fd90d95e94ad238adc6aedcf87..504e787cd66e73a7a69ba0d8a62ba9bd7cfb39d8 100644
--- a/cc/base/switches.cc
+++ b/cc/base/switches.cc
@@ -23,6 +23,9 @@
 // Enables sending the next BeginMainFrame before the previous commit activates.
 const char kEnableMainFrameBeforeActivation[] =
     "enable-main-frame-before-activation";
+
+const char kEnableTopControlsPositionCalculation[] =
+    "enable-top-controls-position-calculation";
 
 // Percentage of the top controls need to be hidden before they will auto hide.
 const char kTopControlsHideThreshold[] = "top-controls-hide-threshold";