CPAPI gears drag drop and renderer IPC.

CPAPI (0.10) functions for gears drag drop; one to extract thedrag type/data given an NPObject *event, one to override thedrop effect (drag cursor).

Gears drag drop API receives a browser event as an NPObject* sothe event is untrusted.  Provide IPC calls to the renderer sogears can pass the event to renderer/V8 for checking, prior todrag type/data extraction, or the setting of the drop effect.

Original patch by Noel Gordon via:
http://codereview.chromium.org/99240

BUG=7995
TEST=none
Review URL: http://codereview.chromium.org/112056

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16808 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 52 insertions, 0 deletions

diff --git a/chrome/plugin/webplugin_proxy.cc b/chrome/plugin/webplugin_proxy.cc
index 0075e79..2a84267 100644
--- a/chrome/plugin/webplugin_proxy.cc
+++ b/chrome/plugin/webplugin_proxy.cc
@@ -305,6 +305,58 @@ void WebPluginProxy::HandleURLRequest(const char *method,
   Send(new PluginHostMsg_URLRequest(route_id_, params));
 }
 
+bool WebPluginProxy::GetDragData(struct NPObject* event, bool add_data,
+                                 int32* identity, int32* event_id,
+                                 std::string* type, std::string* data) {
+  DCHECK(event);
+  NPObjectProxy* proxy = NPObjectProxy::GetProxy(event);
+  if (!proxy)  // NPObject* event should have/be a renderer proxy.
+    return false;
+
+  NPVariant_Param event_param;
+  event_param.type = NPVARIANT_PARAM_OBJECT_POINTER;
+  event_param.npobject_pointer = proxy->npobject_ptr();
+  if (!event_param.npobject_pointer)
+    return false;
+
+  std::vector<NPVariant_Param> values;
+  bool success = false;
+  Send(new PluginHostMsg_GetDragData(route_id_, event_param, add_data,
+                                     &values, &success));
+  if (!success)
+    return false;
+
+  DCHECK(values.size() == 4);
+  DCHECK(values[0].type == NPVARIANT_PARAM_INT);
+  *identity = static_cast<int32>(values[0].int_value);
+  DCHECK(values[1].type == NPVARIANT_PARAM_INT);
+  *event_id = static_cast<int32>(values[1].int_value);
+  DCHECK(values[2].type == NPVARIANT_PARAM_STRING);
+  type->swap(values[2].string_value);
+  if (add_data && (values[3].type == NPVARIANT_PARAM_STRING))
+    data->swap(values[3].string_value);
+
+  return true;
+}
+
+bool WebPluginProxy::SetDropEffect(struct NPObject* event, int effect) {
+  DCHECK(event);
+  NPObjectProxy* proxy = NPObjectProxy::GetProxy(event);
+  if (!proxy)  // NPObject* event should have/be a renderer proxy.
+    return false;
+
+  NPVariant_Param event_param;
+  event_param.type = NPVARIANT_PARAM_OBJECT_POINTER;
+  event_param.npobject_pointer = proxy->npobject_ptr();
+  if (!event_param.npobject_pointer)
+    return false;
+
+  bool success = false;
+  Send(new PluginHostMsg_SetDropEffect(route_id_, event_param, effect,
+                                       &success));
+  return success;
+}
+
 void WebPluginProxy::Paint(const gfx::Rect& rect) {
 #if defined(OS_WIN)
   if (!windowless_hdc_)