Fix media timeline so that thumb never exceeds buffered data

media/base/composite_filter.cc

Index: media/base/composite_filter.cc
diff --git a/media/base/composite_filter.cc b/media/base/composite_filter.cc
index 2b0166c5b00466d96833feae010bd2a1385b0e7c..812416357b9a146633f624b15d1972ad5657a81b 100644
--- a/media/base/composite_filter.cc
+++ b/media/base/composite_filter.cc
@@ -21,7 +21,6 @@ class CompositeFilter::FilterHostImpl : public FilterHost {
   virtual void SetError(PipelineStatus error) OVERRIDE;
   virtual base::TimeDelta GetTime() const OVERRIDE;
   virtual base::TimeDelta GetDuration() const OVERRIDE;
-  virtual void SetTime(base::TimeDelta time) OVERRIDE;
   virtual void SetNaturalVideoSize(const gfx::Size& size) OVERRIDE;
   virtual void NotifyEnded() OVERRIDE;
   virtual void DisableAudioRenderer() OVERRIDE;
@@ -496,10 +495,6 @@ base::TimeDelta CompositeFilter::FilterHostImpl::GetDuration() const {
   return host_->GetDuration();
 }
 
-void CompositeFilter::FilterHostImpl::SetTime(base::TimeDelta time) {
-  host_->SetTime(time);
-}
-
 void CompositeFilter::FilterHostImpl::SetNaturalVideoSize(
     const gfx::Size& size) {
   host_->SetNaturalVideoSize(size);