More removal of GTK code.

ppapi/proxy/ppb_image_data_proxy.cc

Index: ppapi/proxy/ppb_image_data_proxy.cc
diff --git a/ppapi/proxy/ppb_image_data_proxy.cc b/ppapi/proxy/ppb_image_data_proxy.cc
index c9d61f9feae039505b9121dab1244f5f567e2925..87b49a777a1caf669be091172a24d52acfdecf0a 100644
--- a/ppapi/proxy/ppb_image_data_proxy.cc
+++ b/ppapi/proxy/ppb_image_data_proxy.cc
@@ -416,8 +416,6 @@ SkCanvas* PlatformImageData::GetCanvas() {
 ImageHandle PlatformImageData::NullHandle() {
 #if defined(OS_WIN)
   return NULL;
-#elif defined(TOOLKIT_GTK)
-  return 0;
 #else
   return ImageHandle();
 #endif
@@ -426,8 +424,6 @@ ImageHandle PlatformImageData::NullHandle() {
 ImageHandle PlatformImageData::HandleFromInt(int32_t i) {
 #if defined(OS_WIN)
     return reinterpret_cast<ImageHandle>(i);
-#elif defined(TOOLKIT_GTK)
-    return static_cast<ImageHandle>(i);
 #else
     return ImageHandle(i, false);
 #endif
@@ -607,14 +603,6 @@ PP_Resource PPB_ImageData_Proxy::CreateImageData(
 #if defined(OS_WIN)
   *image_handle = dispatcher->ShareHandleWithRemote(
       reinterpret_cast<HANDLE>(static_cast<intptr_t>(local_fd)), false);
-#elif defined(TOOLKIT_GTK)
-  // On X Windows, a PlatformImageData is backed by a SysV shared memory key,
-  // so embed that in a fake PlatformFileForTransit and don't share it across
-  // processes.
-  if (type == PPB_ImageData_Shared::PLATFORM)
-    *image_handle = IPC::PlatformFileForTransit(local_fd, false);
-  else
-    *image_handle = dispatcher->ShareHandleWithRemote(local_fd, false);
 #elif defined(OS_POSIX)
   *image_handle = dispatcher->ShareHandleWithRemote(local_fd, false);
 #else
@@ -643,12 +631,7 @@ void PPB_ImageData_Proxy::OnHostMsgCreatePlatform(
                       desc, &image_handle, &byte_count);
   result->SetHostResource(instance, resource);
   if (resource) {
-#if defined(TOOLKIT_GTK)
-    // On X Windows ImageHandle is a SysV shared memory key.
-    *result_image_handle = image_handle.fd;
-#else
     *result_image_handle = image_handle;
-#endif
   } else {
     *result_image_handle = PlatformImageData::NullHandle();
   }