Set disabled style on GPU window and plugin intermediate window so mouse mess...

gpu/gpu_plugin/gpu_plugin.cc

Index: gpu/gpu_plugin/gpu_plugin.cc
===================================================================
--- gpu/gpu_plugin/gpu_plugin.cc	(revision 36167)
+++ gpu/gpu_plugin/gpu_plugin.cc	(working copy)
@@ -2,6 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+
+#include "base/logging.h"
+#include "build/build_config.h"
 #include "gpu/gpu_plugin/gpu_plugin.h"
 #include "webkit/glue/plugins/nphostapi.h"
 
@@ -11,12 +17,54 @@
 
 namespace {
 
+// TODO(apatrick): move this to platform specific source files.
+#if defined(OS_WIN)
+class PluginObject {
+ public:
+  PluginObject();
+  ~PluginObject();
+
+  void SetWindow(HWND hwnd);
+
+ private:
+  HWND hwnd_;
+  DISALLOW_COPY_AND_ASSIGN(PluginObject);
+};
+
+const wchar_t* const kPluginObject = L"GPUPluginObject";
+
+PluginObject::PluginObject() : hwnd_(NULL) {
+}
+
+PluginObject::~PluginObject() {
+}
+
+void PluginObject::SetWindow(HWND hwnd) {
+  hwnd_ = hwnd;
+  if (hwnd_) {
+    // Store plugin object in window property.
+    SetProp(hwnd_, kPluginObject, reinterpret_cast<HANDLE>(this));
+
+    // Disable plugin window so mouse messages are passed to the parent window.
+    EnableWindow(hwnd_, false);
+  } else {
+    // Clean up properties.
+    RemoveProp(hwnd_, kPluginObject);
+  }
+}
+
+#endif  // defined(OS_WIN)
+
 NPError NPP_New(NPMIMEType plugin_type, NPP instance,
                 uint16 mode, int16 argc, char* argn[],
                 char* argv[], NPSavedData* saved) {
   if (!instance)
     return NPERR_INVALID_INSTANCE_ERROR;
 
+#if defined(OS_WIN)
+  instance->pdata = new PluginObject;
+#endif
+
   return NPERR_NO_ERROR;
 }
 
@@ -24,10 +72,19 @@
   if (!instance)
     return NPERR_INVALID_INSTANCE_ERROR;
 
+#if defined(OS_WIN)
+  delete static_cast<PluginObject*>(instance->pdata);
+#endif
+
   return NPERR_NO_ERROR;
 }
 
 NPError NPP_SetWindow(NPP instance, NPWindow* window) {
+#if defined(OS_WIN)
+  PluginObject* plugin_object = static_cast<PluginObject*>(instance->pdata);
+  plugin_object->SetWindow(reinterpret_cast<HWND>(window->window));
+#endif
+
   return NPERR_NO_ERROR;
 }