Fix WebView compositor input handling

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 739dd3f676ede9b8b9199822e9280e22c3a15050..5ebecc01a7cb62c1add4beb9c1e1c6192aecf7bc 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -18,6 +18,7 @@
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "content/browser/android/content_view_core_impl.h"
+#include "content/browser/android/in_process/synchronous_compositor_impl.h"
 #include "content/browser/android/overscroll_glow.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
 #include "content/browser/renderer_host/compositor_impl_android.h"
@@ -819,10 +820,10 @@ void RenderWidgetHostViewAndroid::UnhandledWheelEvent(
 
 InputEventAckState RenderWidgetHostViewAndroid::FilterInputEvent(
     const WebKit::WebInputEvent& input_event) {
-  if (!content_view_core_)
-    return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
-
-  return content_view_core_->FilterInputEvent(input_event);
+  SynchronousCompositorImpl* compositor =
+      SynchronousCompositorImpl::FromRoutingID(host_->GetRoutingID());
+  return compositor ? compositor->HandleInputEvent(input_event)
+                    : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
 }
 
 void RenderWidgetHostViewAndroid::OnAccessibilityNotifications(