Fix "unreachable code" warnings (MSVC warning 4702) in content/.

content/browser/renderer_host/input/gesture_event_queue.cc

Index: content/browser/renderer_host/input/gesture_event_queue.cc
===================================================================
--- content/browser/renderer_host/input/gesture_event_queue.cc	(revision 256983)
+++ content/browser/renderer_host/input/gesture_event_queue.cc	(working copy)
@@ -84,21 +84,18 @@
       scrolling_in_progress_ = true;
       debouncing_deferral_queue_.clear();
       return true;
+
     case WebInputEvent::GesturePinchBegin:
     case WebInputEvent::GesturePinchEnd:
     case WebInputEvent::GesturePinchUpdate:
       // TODO(rjkroege): Debounce pinch (http://crbug.com/147647)
       return true;
+
     default:
-      if (scrolling_in_progress_) {
+      if (scrolling_in_progress_)
         debouncing_deferral_queue_.push_back(gesture_event);
-        return false;
-      }
-      return true;
+      return !scrolling_in_progress_;
   }
-
-  NOTREACHED();
-  return false;
 }
 
 // NOTE: The filters are applied successively. This simplifies the change.
@@ -150,8 +147,6 @@
     default:
       return true;
   }
-  NOTREACHED();
-  return false;
 }
 
 bool GestureEventQueue::ShouldForwardForCoalescing(