Implement OffscreenCanvas.commit() on Unaccelerated 2D on worker

content/renderer/renderer_blink_platform_impl.h

Index: content/renderer/renderer_blink_platform_impl.h
diff --git a/content/renderer/renderer_blink_platform_impl.h b/content/renderer/renderer_blink_platform_impl.h
index 0754f0a8aea1f32f9e982a67e411242ea426f74b..309259a3df2c1e8757523df7c641435f7fe59b8f 100644
--- a/content/renderer/renderer_blink_platform_impl.h
+++ b/content/renderer/renderer_blink_platform_impl.h
@@ -16,6 +16,7 @@
 #include "build/build_config.h"
 #include "cc/blink/web_compositor_support_impl.h"
 #include "content/child/blink_platform_impl.h"
+#include "content/child/child_shared_bitmap_manager.h"
 #include "content/common/content_export.h"
 #include "content/common/url_loader_factory.mojom.h"
 #include "content/renderer/origin_trials/web_trial_token_validator_impl.h"
@@ -290,6 +291,7 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl {
   scoped_refptr<IPC::SyncMessageFilter> sync_message_filter_;
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
   scoped_refptr<QuotaMessageFilter> quota_message_filter_;
+  ChildSharedBitmapManager* shared_bitmap_manager_;
 
   std::unique_ptr<WebDatabaseObserverImpl> web_database_observer_impl_;