Move SharedBitmapManager implementation out of content/

content/renderer/renderer_clipboard_delegate.cc

Index: content/renderer/renderer_clipboard_delegate.cc
diff --git a/content/renderer/renderer_clipboard_delegate.cc b/content/renderer/renderer_clipboard_delegate.cc
index 1fb70deb3c7986c5759efc55e007ad6853e53b3c..b237cd4a2297a64b825355db4cede5daa271dc7f 100644
--- a/content/renderer/renderer_clipboard_delegate.cc
+++ b/content/renderer/renderer_clipboard_delegate.cc
@@ -8,6 +8,7 @@
 
 #include "base/memory/shared_memory.h"
 #include "base/numerics/safe_math.h"
+#include "components/display_compositor/child/child_shared_bitmap_manager.h"
 #include "content/common/clipboard_messages.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/render_thread_impl.h"
@@ -138,7 +139,9 @@ bool RendererClipboardDelegate::WriteImage(ui::ClipboardType clipboard_type,
 
     // Allocate a shared memory buffer to hold the bitmap bits.
     uint32_t buf_size = checked_buf_size.ValueOrDie();
-    shared_buf = ChildThreadImpl::AllocateSharedMemory(buf_size);
+    shared_buf =
+        display_compositor::ChildSharedBitmapManager::AllocateSharedMemory(
+            buf_size);
     if (!shared_buf)
       return false;
     if (!shared_buf->Map(buf_size))