cc: Add mailbox support to ResourceProvider write locks.

cc/resources/resource_provider.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 239 matching lines @@
    private:
     GLenum unit_;
     GLenum target_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedSamplerGL);
   };
 
   class CC_EXPORT ScopedWriteLockGL {
    public:
     ScopedWriteLockGL(ResourceProvider* resource_provider,
-                      ResourceId resource_id);
+                      ResourceId resource_id,
+                      bool use_mailbox);
     ~ScopedWriteLockGL();
 
-    unsigned texture_id() const { return texture_id_; }
+    unsigned ProduceTextureId();
+    void ReleaseTextureId();
 
     void UpdateResourceSyncToken(const gpu::SyncToken& sync_token) {
       set_sync_token_ = true;
       sync_token_ = sync_token;
     }
 
    private:
     ResourceProvider* resource_provider_;
     ResourceProvider::Resource* resource_;
+    bool use_mailbox_;
     unsigned texture_id_;
     bool set_sync_token_;
     gpu::SyncToken sync_token_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGL);
   };
 
   class CC_EXPORT ScopedReadLockSoftware {
    public:
     ScopedReadLockSoftware(ResourceProvider* resource_provider,
@@ skipping 46 matching lines @@
     ResourceProvider::Resource* resource_;
     std::unique_ptr<gfx::GpuMemoryBuffer> gpu_memory_buffer_;
     base::ThreadChecker thread_checker_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGpuMemoryBuffer);
   };
 
   class CC_EXPORT ScopedWriteLockGr {
    public:
     ScopedWriteLockGr(ResourceProvider* resource_provider,
-                      ResourceId resource_id);
+                      ResourceId resource_id,
+                      bool use_mailbox);
     ~ScopedWriteLockGr();
 
     void InitSkSurface(bool use_distance_field_text,
                        bool can_use_lcd_text,
                        int msaa_sample_count);
     void ReleaseSkSurface();
 
     SkSurface* sk_surface() { return sk_surface_.get(); }
 
     gfx::Size GetResourceSize() const { return resource_->size; }
 
     void UpdateResourceSyncToken(const gpu::SyncToken& sync_token) {
       set_sync_token_ = true;
       sync_token_ = sync_token;
     }
 
    private:
     ResourceProvider* resource_provider_;
     ResourceProvider::Resource* resource_;
+    bool use_mailbox_;
+    unsigned texture_id_;
     base::ThreadChecker thread_checker_;
     sk_sp<SkSurface> sk_surface_;
     bool set_sync_token_;
     gpu::SyncToken sync_token_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGr);
   };
 
   class Fence : public base::RefCounted<Fence> {
    public:
@@ skipping 312 matching lines @@
   // A process-unique ID used for disambiguating memory dumps from different
   // resource providers.
   int tracing_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_