Move SharedBitmapManager implementation out of content/

components/display_compositor/BUILD.gn

Index: components/display_compositor/BUILD.gn
diff --git a/components/display_compositor/BUILD.gn b/components/display_compositor/BUILD.gn
index e54fb14c2924bb7242f7a688186c10a675bb807e..8f786cf0888d69785d435bf01753e8a3d28f98fc 100644
--- a/components/display_compositor/BUILD.gn
+++ b/components/display_compositor/BUILD.gn
@@ -22,6 +22,8 @@ component("display_compositor") {
     "gpu_compositor_frame_sink_delegate.h",
     "gpu_root_compositor_frame_sink.cc",
     "gpu_root_compositor_frame_sink.h",
+    "host_shared_bitmap_manager.cc",
+    "host_shared_bitmap_manager.h",
   ]
 
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
@@ -33,6 +35,7 @@ component("display_compositor") {
     "//cc",
     "//cc/ipc:interfaces",
     "//cc/surfaces",
+    "//components/display_compositor/interfaces",
     "//gpu/command_buffer/client",
     "//gpu/command_buffer/client:gles2_interface",
     "//gpu/command_buffer/common",
@@ -78,6 +81,7 @@ source_set("unit_tests") {
   testonly = true
   sources = [
     "buffer_queue_unittest.cc",
+    "host_shared_bitmap_manager_unittest.cc",
   ]
 
   if (!use_aura && !is_mac) {