Add hints for potential overlay promotion on android.

cc/resources/texture_mailbox.h

 // Copyright 2013 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_TEXTURE_MAILBOX_H_
 #define CC_RESOURCES_TEXTURE_MAILBOX_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 40 matching lines @@
   const int8_t* name() const { return mailbox().name; }
   uint32_t target() const { return mailbox_holder_.texture_target; }
   const gpu::SyncToken& sync_token() const {
     return mailbox_holder_.sync_token;
   }
   void set_sync_token(const gpu::SyncToken& sync_token) {
     mailbox_holder_.sync_token = sync_token;
   }
 
   bool is_overlay_candidate() const { return is_overlay_candidate_; }
+  void set_is_overlay_candidate(bool overlay_candidate) {
+    is_overlay_candidate_ = overlay_candidate;
+  }
   bool secure_output_only() const { return secure_output_only_; }
   bool nearest_neighbor() const { return nearest_neighbor_; }
   void set_nearest_neighbor(bool nearest_neighbor) {
     nearest_neighbor_ = nearest_neighbor;
   }
   const gfx::ColorSpace& color_space() const { return color_space_; }
   void set_color_space(const gfx::ColorSpace& color_space) {
     color_space_ = color_space;
   }
 
   // This is valid if allow_overlau() or IsSharedMemory() is true.
   gfx::Size size_in_pixels() const { return size_in_pixels_; }
 
   SharedBitmap* shared_bitmap() const { return shared_bitmap_; }
   size_t SharedMemorySizeInBytes() const;
 
+#if defined(OS_ANDROID)
+  bool is_backed_by_surface_texture() const {
+    return is_backed_by_surface_texture_;
+  }
+
+  void set_is_backed_by_surface_texture(bool value) {
+    is_backed_by_surface_texture_ = value;
+  }
+
+  bool wants_promotion_hint() const { return wants_promotion_hint_; }
+
+  void set_wants_promotion_hint(bool value) { wants_promotion_hint_ = value; }
+#endif
+
  private:
   gpu::MailboxHolder mailbox_holder_;
   SharedBitmap* shared_bitmap_;
   gfx::Size size_in_pixels_;
   bool is_overlay_candidate_;
+#if defined(OS_ANDROID)
+  bool is_backed_by_surface_texture_;
+  bool wants_promotion_hint_;
+#endif
   bool secure_output_only_;
   bool nearest_neighbor_;
   gfx::ColorSpace color_space_;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TEXTURE_MAILBOX_H_