Move NPAPI implementation out of webkit/plugins/npapi and into content.

webkit/plugins/npapi/plugin_utils.h

Index: webkit/plugins/npapi/plugin_utils.h
===================================================================
--- webkit/plugins/npapi/plugin_utils.h	(revision 212369)
+++ webkit/plugins/npapi/plugin_utils.h	(working copy)
@@ -6,6 +6,7 @@
 #define WEBKIT_PLUGINS_NPAPI_PLUGIN_UTILS_H_
 
 #include "base/strings/string16.h"
+#include "ui/gfx/native_widget_types.h"
 
 namespace base {
 class Version;
@@ -31,7 +32,26 @@
 // instead of exiting cleanly.
 bool ShouldForcefullyTerminatePluginProcess();
 
+#if defined(OS_WIN)
+// The window class name for a plugin window.
+extern const char16 kNativeWindowClassName[];
+extern const char16 kPluginNameAtomProperty[];
+extern const char16 kPluginVersionAtomProperty[];
+extern const char16 kDummyActivationWindowName[];
 
+bool IsPluginDelegateWindow(HWND window);
+bool GetPluginNameFromWindow(HWND window, base::string16* plugin_name);
+bool GetPluginVersionFromWindow(HWND window, base::string16* plugin_version);
+
+// Returns true if the window handle passed in is that of the dummy
+// activation window for windowless plugins.
+bool IsDummyActivationWindow(HWND window);
+
+// Returns the default HWND to parent the windowed plugins and dummy windows
+// for activation to when none isavailable.
+HWND GetDefaultWindowParent();
+#endif
+
 }  // namespace npapi
 }  // namespace webkit