Add hints for potential overlay promotion on android.

cc/resources/texture_mailbox.cc

 // 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.
 
 #include "cc/resources/texture_mailbox.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "cc/resources/shared_bitmap.h"
 
 namespace cc {
 
 TextureMailbox::TextureMailbox() : shared_bitmap_(NULL) {
 }
 
 TextureMailbox::TextureMailbox(const gpu::MailboxHolder& mailbox_holder)
     : mailbox_holder_(mailbox_holder),
       shared_bitmap_(NULL),
       is_overlay_candidate_(false),
+#if defined(OS_ANDROID)
+      is_backed_by_surface_texture_(false),
+#endif
       secure_output_only_(false),
-      nearest_neighbor_(false) {}
+      nearest_neighbor_(false) {
+}
 
 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
                                const gpu::SyncToken& sync_token,
                                uint32_t target)
     : mailbox_holder_(mailbox, sync_token, target),
       shared_bitmap_(NULL),
       is_overlay_candidate_(false),
+#if defined(OS_ANDROID)
+      is_backed_by_surface_texture_(false),
+#endif
       secure_output_only_(false),
-      nearest_neighbor_(false) {}
+      nearest_neighbor_(false) {
+}
 
-TextureMailbox::TextureMailbox(
-    const gpu::Mailbox& mailbox,
-    const gpu::SyncToken& sync_token,
-    uint32_t target,
-    const gfx::Size& size_in_pixels,
-    bool is_overlay_candidate,
-    bool secure_output_only)
+TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
+                               const gpu::SyncToken& sync_token,
+                               uint32_t target,
+                               const gfx::Size& size_in_pixels,
+                               bool is_overlay_candidate,
+                               bool secure_output_only)
     : mailbox_holder_(mailbox, sync_token, target),
       shared_bitmap_(nullptr),
       size_in_pixels_(size_in_pixels),
       is_overlay_candidate_(is_overlay_candidate),
+#if defined(OS_ANDROID)
+      is_backed_by_surface_texture_(false),
+#endif
       secure_output_only_(secure_output_only),
       nearest_neighbor_(false) {
   DCHECK(!is_overlay_candidate || !size_in_pixels.IsEmpty());
 }
 
 TextureMailbox::TextureMailbox(SharedBitmap* shared_bitmap,
                                const gfx::Size& size_in_pixels)
     : shared_bitmap_(shared_bitmap),
       size_in_pixels_(size_in_pixels),
       is_overlay_candidate_(false),
+#if defined(OS_ANDROID)
+      is_backed_by_surface_texture_(false),
+#endif
       secure_output_only_(false),
       nearest_neighbor_(false) {
   // If an embedder of cc gives an invalid TextureMailbox, we should crash
   // here to identify the offender.
   CHECK(SharedBitmap::VerifySizeInBytes(size_in_pixels_));
 }
 
 TextureMailbox::~TextureMailbox() {}
 
 bool TextureMailbox::Equals(const TextureMailbox& other) const {
   if (other.IsTexture()) {
     return IsTexture() && !memcmp(mailbox_holder_.mailbox.name,
                                   other.mailbox_holder_.mailbox.name,
                                   sizeof(mailbox_holder_.mailbox.name));
   } else if (other.IsSharedMemory()) {
     return IsSharedMemory() && (shared_bitmap_ == other.shared_bitmap_);
   }
 
   DCHECK(!other.IsValid());
   return !IsValid();
 }
 
 size_t TextureMailbox::SharedMemorySizeInBytes() const {
   // UncheckedSizeInBytes is okay because we VerifySizeInBytes in the
   // constructor and the field is immutable.
   return SharedBitmap::UncheckedSizeInBytes(size_in_pixels_);
 }
 
 }  // namespace cc