content: Make sure the renderer notifies the browser about touch-event handlers properly.

content/browser/renderer_host/render_widget_host_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 
 #include <utility>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 271 matching lines @@
     IPC_MESSAGE_HANDLER(ViewHostMsg_CompositorSurfaceBuffersSwapped,
                         OnCompositorSurfaceBuffersSwapped)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnMsgUpdateRect)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateIsDelayed, OnMsgUpdateIsDelayed)
     IPC_MESSAGE_HANDLER(ViewHostMsg_HandleInputEvent_ACK, OnMsgInputEventAck)
     IPC_MESSAGE_HANDLER(ViewHostMsg_BeginSmoothScroll, OnMsgBeginSmoothScroll)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnMsgFocus)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnMsgBlur)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidChangeNumTouchEvents,
                         OnMsgDidChangeNumTouchEvents)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_HasTouchEventHandlers,
+                        OnMsgHasTouchEventHandlers)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnMsgSetCursor)
     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
                         OnMsgTextInputStateChanged)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeCompositionRangeChanged,
                         OnMsgImeCompositionRangeChanged)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeCancelComposition,
                         OnMsgImeCancelComposition)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidActivateAcceleratedCompositing,
                         OnMsgDidActivateAcceleratedCompositing)
     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnMsgLockMouse)
@@ skipping 1251 matching lines @@
 void RenderWidgetHostImpl::OnMsgBlur() {
   // Only RenderViewHost can deal with that message.
   RecordAction(UserMetricsAction("BadMessageTerminate_RWH5"));
   GetProcess()->ReceivedBadMessage();
 }
 
 void RenderWidgetHostImpl::OnMsgDidChangeNumTouchEvents(int count) {
   has_touch_handler_ = count > 0;
 }
 
+void RenderWidgetHostImpl::OnMsgHasTouchEventHandlers(bool has_handlers) {
+  has_touch_handler_ = has_handlers;
+}
+
 void RenderWidgetHostImpl::OnMsgSetCursor(const WebCursor& cursor) {
   if (!view_) {
     return;
   }
   view_->UpdateCursor(cursor);
 }
 
 void RenderWidgetHostImpl::OnMsgTextInputStateChanged(
     ui::TextInputType type,
     bool can_compose_inline) {
@@ skipping 335 matching lines @@
   // indicate that no callback is in progress (i.e. without this line
   // DelayedAutoResized will not get called again).
   new_auto_size_.SetSize(0, 0);
   if (!should_auto_resize_)
     return;
 
   OnRenderAutoResized(new_size);
 }
 
 }  // namespace content