Introduce new async IPC message to get file icons

third_party/WebKit/WebCore/platform/graphics/Icon.h

Index: third_party/WebKit/WebCore/platform/graphics/Icon.h
===================================================================
--- third_party/WebKit/WebCore/platform/graphics/Icon.h	(revision 58975)
+++ third_party/WebKit/WebCore/platform/graphics/Icon.h	(working copy)
@@ -42,6 +42,7 @@
 #elif PLATFORM(EFL)
 #include <Evas.h>
 #elif PLATFORM(CHROMIUM)
+#include "Image.h"
 #include "PlatformIcon.h"
 #endif
 
@@ -61,6 +62,8 @@
 
 #if PLATFORM(WIN)
     static PassRefPtr<Icon> create(HICON hIcon) { return adoptRef(new Icon(hIcon)); }
+#elif PLATFORM(CHROMIUM)
+    static PassRefPtr<Icon> create(PassRefPtr<PlatformIcon> icon) { return adoptRef(new Icon(icon)); }
 #endif
 
 private:
@@ -80,8 +83,8 @@
     Icon();
     Evas_Object* m_icon;
 #elif PLATFORM(CHROMIUM)
-    Icon(const PlatformIcon&);
-    PlatformIcon m_icon;
+    Icon(PassRefPtr<PlatformIcon>);
+    RefPtr<PlatformIcon> m_icon;
 #endif
 };