Move compositor thread input handling logic into content

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index a3cf0d3f288c4128fcd1d3ec83beb3236a6dc610..5cc8628f56bce0b8163c96b8128498949d1a7e21 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -165,6 +165,7 @@ LayerTreeHostImpl::LayerTreeHostImpl(
     RenderingStatsInstrumentation* rendering_stats_instrumentation)
     : client_(client),
       proxy_(proxy),
+      input_handler_client_(NULL),
       did_lock_scrolling_layer_(false),
       should_bubble_scrolls_(false),
       wheel_scrolling_(false),
@@ -278,6 +279,8 @@ bool LayerTreeHostImpl::CanDraw() {
 
 void LayerTreeHostImpl::Animate(base::TimeTicks monotonic_time,
                                 base::Time wall_clock_time) {
+  if (input_handler_client_)
+    input_handler_client_->Animate(monotonic_time);
   AnimatePageScale(monotonic_time);
   AnimateLayers(monotonic_time, wall_clock_time);
   AnimateScrollbars(monotonic_time);
@@ -721,6 +724,11 @@ bool LayerTreeHostImpl::CalculateRenderPasses(FrameData* frame) {
   return draw_frame;
 }
 
+void LayerTreeHostImpl::MainThreadHasStoppedFlinging() {
+  if (input_handler_client_)
+    input_handler_client_->MainThreadHasStoppedFlinging();
+}
+
 void LayerTreeHostImpl::UpdateBackgroundAnimateTicking(
     bool should_background_tick) {
   bool enabled = should_background_tick &&
@@ -1458,6 +1466,10 @@ bool LayerTreeHostImpl::EnsureRenderSurfaceLayerList() {
   return !active_tree_->RenderSurfaceLayerList().empty();
 }
 
+void LayerTreeHostImpl::BindToClient(InputHandlerClient* client) {
+  input_handler_client_ = client;

[danakj, 2013/05/01 19:20:43]

DCHECK(input_handler_client_ == NULL) ?

+}
+
 InputHandler::ScrollStatus LayerTreeHostImpl::ScrollBegin(
     gfx::Point viewport_point, InputHandler::ScrollInputType type) {
   TRACE_EVENT0("cc", "LayerTreeHostImpl::ScrollBegin");