chromeos: removes creation of ImageCursorsSet from content

It's never used.

BUG=none
TEST=none

Change-Id: If4677c56c51f33fe58eb97a4f03a72c087af8297
Reviewed-on: https://chromium-review.googlesource.com/1097949Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566650}

content/browser/browser_main_loop.cc

@@ -231,10 +231,6 @@
 #include "crypto/nss_util.h"
 #endif
 
-#if BUILDFLAG(ENABLE_MUS)
-#include "services/ui/common/image_cursors_set.h"
-#endif
-
 // One of the linux specific headers defines this as a macro.
 #ifdef DestroyAll
 #undef DestroyAll
@@ -1010,12 +1006,6 @@ void BrowserMainLoop::ShutdownThreadsAndCleanUp() {
   if (RenderProcessHost::run_renderer_in_process())
     RenderProcessHostImpl::ShutDownInProcessRenderer();
 
-#if BUILDFLAG(ENABLE_MUS)
-  // NOTE: because of dependencies this has to happen before
-  // PostMainMessageLoopRun().
-  image_cursors_set_.reset();
-#endif
-
   if (parts_) {
     TRACE_EVENT0("shutdown",
                  "BrowserMainLoop::Subsystem:PostMainMessageLoopRun");
@@ -1516,11 +1506,6 @@ bool BrowserMainLoop::InitializeToolkit() {
                                        : aura::Env::Mode::LOCAL);
 #endif  // defined(USE_AURA)
 
-#if BUILDFLAG(ENABLE_MUS)
-  if (features::IsMashEnabled())
-    image_cursors_set_ = std::make_unique<ui::ImageCursorsSet>();
-#endif
-
   if (parts_)
     parts_->ToolkitInitialized();
 

content/browser/browser_main_loop.h

@@ -81,12 +81,6 @@ namespace net {
 class NetworkChangeNotifier;
 }  // namespace net
 
-#if BUILDFLAG(ENABLE_MUS)
-namespace ui {
-class ImageCursorsSet;
-}
-#endif
-
 namespace viz {
 class CompositingModeReporterImpl;
 class FrameSinkManagerImpl;
@@ -192,10 +186,6 @@ class CONTENT_EXPORT BrowserMainLoop {
     return startup_trace_file_;
   }
 
-#if BUILDFLAG(ENABLE_MUS)
-  ui::ImageCursorsSet* image_cursors_set() { return image_cursors_set_.get(); }
-#endif
-
   // Returns the task runner for tasks that that are critical to producing a new
   // CompositorFrame on resize. On Mac this will be the task runner provided by
   // WindowResizeHelperMac, on other platforms it will just be the thread task
@@ -311,9 +301,6 @@ class CONTENT_EXPORT BrowserMainLoop {
 #if defined(USE_AURA)
   std::unique_ptr<aura::Env> env_;
 #endif
-#if BUILDFLAG(ENABLE_MUS)
-  std::unique_ptr<ui::ImageCursorsSet> image_cursors_set_;
-#endif
 
 #if defined(OS_ANDROID)
   // Android implementation of ScreenOrientationDelegate