Move SharedBitmapManager implementation out of content/

content/public/test/mock_render_thread.cc

Index: content/public/test/mock_render_thread.cc
diff --git a/content/public/test/mock_render_thread.cc b/content/public/test/mock_render_thread.cc
index 393c6fe9d98d08c38452af72f2064fe48aa2e65c..51ee9d4632218a57135dbab07481b6b86e10722d 100644
--- a/content/public/test/mock_render_thread.cc
+++ b/content/public/test/mock_render_thread.cc
@@ -77,12 +77,8 @@ class MockRenderMessageFilterImpl : public mojom::RenderMessageFilter {
     NOTREACHED();
   }
 
-  void AllocatedSharedBitmap(mojo::ScopedSharedBufferHandle buffer,
-                             const cc::SharedBitmapId& id) override {
-    NOTREACHED();
-  }
-
-  void DeletedSharedBitmap(const cc::SharedBitmapId& id) override {
+  void GetSharedBitmapManager(
+      cc::mojom::SharedBitmapManagerAssociatedRequest request) override {
     NOTREACHED();
   }