Fix WebView compositor input handling

android_webview/browser/in_process_renderer/in_process_renderer_client.cc

Index: android_webview/browser/in_process_renderer/in_process_renderer_client.cc
diff --git a/android_webview/browser/in_process_renderer/in_process_renderer_client.cc b/android_webview/browser/in_process_renderer/in_process_renderer_client.cc
index 631a58c9726fde2a0fa57dd604dcbad63f8472f1..ff7dd4ee08b9ec7ab890e31c46e46ee503f76f3e 100644
--- a/android_webview/browser/in_process_renderer/in_process_renderer_client.cc
+++ b/android_webview/browser/in_process_renderer/in_process_renderer_client.cc
@@ -29,6 +29,13 @@ int GetInProcessRendererId() {
 
 }
 
+InProcessRendererClient::InProcessRendererClient()
+    : input_event_handler_(NULL) {
+}
+
+InProcessRendererClient::~InProcessRendererClient() {
+}
+
 MessageLoop* InProcessRendererClient::OverrideCompositorMessageLoop() const {
  MessageLoop* rv = content::BrowserThread::UnsafeGetMessageLoopForThread(
       content::BrowserThread::UI);
@@ -41,15 +48,16 @@ void InProcessRendererClient::DidCreateSynchronousCompositor(
     content::SynchronousCompositor* compositor) {
   InProcessViewRenderer* view_renderer =
       InProcessViewRenderer::FromId(GetInProcessRendererId(), render_view_id);
-  if (view_renderer)
+  if (view_renderer) {
     view_renderer->BindSynchronousCompositor(compositor);
+    view_renderer->BindSynchronousInputEventHandler(input_event_handler_);
+  }
 }
 
-bool InProcessRendererClient::ShouldCreateCompositorInputHandler() const {
-  // Compositor input handling will be performed by the renderer host
-  // when UI and compositor threads are merged, so we disable client compositor
-  // input handling in this case.
-  return false;
+void InProcessRendererClient::DidCreateSynchronousInputEventHandler(
+    content::SynchronousInputEventHandler* input_event_handler) {
+  DCHECK(!input_event_handler_ || !input_event_handler);
+  input_event_handler_ = input_event_handler;
 }
 
 }  // namespace android_webview