Fix "unused variable" warnings.

cc/scheduler/begin_frame_source.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/scheduler/begin_frame_source.h"
 
 #include <stddef.h>
 
 #include "base/auto_reset.h"
 #include "base/location.h"
@@ skipping 31 matching lines @@
   DCHECK(args.frame_time >= last_begin_frame_args_.frame_time);
   bool used = OnBeginFrameDerivedImpl(args);
   if (used) {
     last_begin_frame_args_ = args;
   } else {
     ++dropped_begin_frame_args_;
   }
 }
 
 // BeginFrameSourceBase ------------------------------------------------------
-BeginFrameSourceBase::BeginFrameSourceBase()
-    : paused_(false), inside_as_value_into_(false) {}
+BeginFrameSourceBase::BeginFrameSourceBase() : paused_(false) {}
 
 BeginFrameSourceBase::~BeginFrameSourceBase() {}
 
 void BeginFrameSourceBase::AddObserver(BeginFrameObserver* obs) {
   DEBUG_FRAMES("BeginFrameSourceBase::AddObserver", "num observers",
                observers_.size(), "to add observer", obs);
   DCHECK(obs);
   DCHECK(observers_.find(obs) == observers_.end())
       << "AddObserver cannot be called with an observer that was already added";
   bool observers_was_empty = observers_.empty();
@@ skipping 164 matching lines @@
     BeginFrameArgs last_args = it->LastUsedBeginFrameArgs();
     if (!last_args.IsValid() ||
         (args.frame_time >
          last_args.frame_time + args.interval / kDoubleTickDivisor)) {
       it->OnBeginFrame(args);
     }
   }
 }
 
 }  // namespace cc