Replace OS_LINUX ifdefs with OS_POSIX & !OS_MACOSX, TOOLKIT_USES_GTK, or

content/common/gpu/gpu_command_buffer_stub.cc

Index: content/common/gpu/gpu_command_buffer_stub.cc
diff --git a/content/common/gpu/gpu_command_buffer_stub.cc b/content/common/gpu/gpu_command_buffer_stub.cc
index 600cab24b10769d5af6255f585957bad9ddd75bc..bd0fd356ff18d5465ae3cc7c584daf7540cc44b4 100644
--- a/content/common/gpu/gpu_command_buffer_stub.cc
+++ b/content/common/gpu/gpu_command_buffer_stub.cc
@@ -402,7 +402,7 @@ void GpuCommandBufferStub::ResizeCallback(gfx::Size size) {
     scheduler_->decoder()->ResizeOffscreenFrameBuffer(size);
     scheduler_->decoder()->UpdateOffscreenFrameBufferSize();
   } else {
-#if defined(OS_LINUX) && !defined(TOUCH_UI) || defined(OS_WIN)
+#if defined(TOOLKIT_USES_GTK) && !defined(TOUCH_UI) || defined(OS_WIN)
     GpuChannelManager* gpu_channel_manager = channel_->gpu_channel_manager();
     gpu_channel_manager->Send(
         new GpuHostMsg_ResizeView(renderer_id_,
@@ -416,7 +416,7 @@ void GpuCommandBufferStub::ResizeCallback(gfx::Size size) {
 }
 
 void GpuCommandBufferStub::ViewResized() {
-#if defined(OS_LINUX) && !defined(TOUCH_UI) || defined(OS_WIN)
+#if defined(TOOLKIT_USES_GTK) && !defined(TOUCH_UI) || defined(OS_WIN)
   DCHECK(handle_ != gfx::kNullPluginWindow);
   scheduler_->SetScheduled(true);