content: Remove blimp compositing dependencies.

content/renderer/gpu/compositor_dependencies.h

Index: content/renderer/gpu/compositor_dependencies.h
diff --git a/content/renderer/gpu/compositor_dependencies.h b/content/renderer/gpu/compositor_dependencies.h
index 866b7795d1033e9b8588b196256c5e4acea03b56..437db25cd5be7ef8668c05ca8075f5421a59145d 100644
--- a/content/renderer/gpu/compositor_dependencies.h
+++ b/content/renderer/gpu/compositor_dependencies.h
@@ -16,7 +16,6 @@ class SingleThreadTaskRunner;
 }
 
 namespace cc {
-class ImageSerializationProcessor;
 class TaskGraphRunner;
 }
 
@@ -48,7 +47,6 @@ class CompositorDependencies {
   virtual scoped_refptr<base::SingleThreadTaskRunner>
   GetCompositorImplThreadTaskRunner() = 0;
   virtual blink::scheduler::RendererScheduler* GetRendererScheduler() = 0;
-  virtual cc::ImageSerializationProcessor* GetImageSerializationProcessor() = 0;
   virtual cc::TaskGraphRunner* GetTaskGraphRunner() = 0;
   virtual bool AreImageDecodeTasksEnabled() = 0;
   virtual bool IsThreadedAnimationEnabled() = 0;