WIP GPU scheduler + delayed activation / tile draw

cc/raster/one_copy_raster_buffer_provider.h

Index: cc/raster/one_copy_raster_buffer_provider.h
diff --git a/cc/raster/one_copy_raster_buffer_provider.h b/cc/raster/one_copy_raster_buffer_provider.h
index 513c393fd5b626ef3fd318866aafd722088a515c..cade7e8595d76997aff9eea1ced217b6d245f80b 100644
--- a/cc/raster/one_copy_raster_buffer_provider.h
+++ b/cc/raster/one_copy_raster_buffer_provider.h
@@ -7,6 +7,7 @@
 
 #include <stdint.h>
 
+#include "base/cancelable_callback.h"
 #include "base/macros.h"
 #include "cc/output/context_provider.h"
 #include "cc/raster/raster_buffer_provider.h"
@@ -37,6 +38,9 @@ class CC_EXPORT OneCopyRasterBufferProvider : public RasterBufferProvider {
       uint64_t resource_content_id,
       uint64_t previous_content_id) override;
   void ReleaseBufferForRaster(std::unique_ptr<RasterBuffer> buffer) override;
+  bool IsResourceReadyToDraw(const Resource* resource) override;
+  void SignalResourcesReadyToDraw(const std::vector<const Resource*>& resources,
+                                  const base::Closure& callback) override;
   void OrderingBarrier() override;
   ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
   bool IsResourceSwizzleRequired(bool must_support_alpha) const override;
@@ -62,8 +66,7 @@ class CC_EXPORT OneCopyRasterBufferProvider : public RasterBufferProvider {
     RasterBufferImpl(OneCopyRasterBufferProvider* client,
                      ResourceProvider* resource_provider,
                      const Resource* resource,
-                     uint64_t previous_content_id,
-                     bool async_worker_context_enabled);
+                     uint64_t previous_content_id);
     ~RasterBufferImpl() override;
 
     // Overridden from RasterBuffer: