Revert of Replacing allocate bitmap IPC messages with a new Mojo interface.

content/renderer/pepper/pepper_compositor_host.cc

Index: content/renderer/pepper/pepper_compositor_host.cc
diff --git a/content/renderer/pepper/pepper_compositor_host.cc b/content/renderer/pepper/pepper_compositor_host.cc
index 8df4f6cea8ff0e64200a528ab0259d5e15395768..ade4fb433c740884d0f1e2a9e37d9bd065877a60 100644
--- a/content/renderer/pepper/pepper_compositor_host.cc
+++ b/content/renderer/pepper/pepper_compositor_host.cc
@@ -17,12 +17,12 @@
 #include "cc/resources/texture_mailbox.h"
 #include "cc/trees/layer_tree_host.h"
 #include "content/child/child_shared_bitmap_manager.h"
+#include "content/child/child_thread_impl.h"
 #include "content/public/renderer/renderer_ppapi_host.h"
 #include "content/renderer/pepper/gfx_conversion.h"
 #include "content/renderer/pepper/host_globals.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/pepper/ppb_image_data_impl.h"
-#include "content/renderer/render_thread_impl.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/host/dispatch_host_message.h"
 #include "ppapi/host/ppapi_host.h"
@@ -315,7 +315,7 @@
       DCHECK_EQ(desc.stride, desc.size.width * 4);
       DCHECK_EQ(desc.format, PP_IMAGEDATAFORMAT_RGBA_PREMUL);
       std::unique_ptr<cc::SharedBitmap> bitmap =
-          RenderThreadImpl::current()
+          ChildThreadImpl::current()
               ->shared_bitmap_manager()
               ->GetBitmapForSharedMemory(image_shm.get());