input: Remove dead code.

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 9f5af2063e57863010484d7846edec2dd22ca1df..d936b5f23947edc8e2ff3233a9102694c7276b80 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -401,8 +401,6 @@ SkColor RenderWidgetHostViewMac::BrowserCompositorMacGetGutterColor(
 }
 
 void RenderWidgetHostViewMac::BrowserCompositorMacOnBeginFrame() {
-  needs_flush_input_ = false;
-  render_widget_host_->OnBeginFrame();
   UpdateNeedsBeginFramesInternal();
 }
 
@@ -445,7 +443,6 @@ RenderWidgetHostViewMac::RenderWidgetHostViewMac(RenderWidgetHost* widget,
       allow_pause_for_resize_or_repaint_(true),
       is_guest_view_hack_(is_guest_view_hack),
       fullscreen_parent_host_view_(nullptr),
-      needs_flush_input_(false),
       weak_factory_(this) {
   // |cocoa_view_| owns us and we will be deleted when |cocoa_view_|
   // goes away.  Since we autorelease it, our caller must put
@@ -1211,14 +1208,8 @@ void RenderWidgetHostViewMac::SetNeedsBeginFrames(bool needs_begin_frames) {
   UpdateNeedsBeginFramesInternal();
 }
 
-void RenderWidgetHostViewMac::OnSetNeedsFlushInput() {
-  needs_flush_input_ = true;
-  UpdateNeedsBeginFramesInternal();
-}
-
 void RenderWidgetHostViewMac::UpdateNeedsBeginFramesInternal() {
-  browser_compositor_->SetNeedsBeginFrames(needs_begin_frames_ ||
-                                           needs_flush_input_);
+  browser_compositor_->SetNeedsBeginFrames(needs_begin_frames_);
 }
 
 void RenderWidgetHostViewMac::KillSelf() {