Add hints for potential overlay promotion on android.

cc/resources/texture_mailbox.cc

Index: cc/resources/texture_mailbox.cc
diff --git a/cc/resources/texture_mailbox.cc b/cc/resources/texture_mailbox.cc
index 6788fe5b4cf357a023aed35ccff64ac471c1c526..bc8915e583c639f89e7b34856c14c0a7dfbdc70a 100644
--- a/cc/resources/texture_mailbox.cc
+++ b/cc/resources/texture_mailbox.cc
@@ -19,8 +19,13 @@ 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),
+      wants_promotion_hint_(false),
+#endif
       secure_output_only_(false),
-      nearest_neighbor_(false) {}
+      nearest_neighbor_(false) {
+}
 
 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
                                const gpu::SyncToken& sync_token,
@@ -28,20 +33,28 @@ TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
     : mailbox_holder_(mailbox, sync_token, target),
       shared_bitmap_(NULL),
       is_overlay_candidate_(false),
+#if defined(OS_ANDROID)
+      is_backed_by_surface_texture_(false),
+      wants_promotion_hint_(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),
+      wants_promotion_hint_(false),
+#endif
       secure_output_only_(secure_output_only),
       nearest_neighbor_(false) {
   DCHECK(!is_overlay_candidate || !size_in_pixels.IsEmpty());
@@ -52,6 +65,10 @@ TextureMailbox::TextureMailbox(SharedBitmap* shared_bitmap,
     : shared_bitmap_(shared_bitmap),
       size_in_pixels_(size_in_pixels),
       is_overlay_candidate_(false),
+#if defined(OS_ANDROID)
+      is_backed_by_surface_texture_(false),
+      wants_promotion_hint_(false),
+#endif
       secure_output_only_(false),
       nearest_neighbor_(false) {
   // If an embedder of cc gives an invalid TextureMailbox, we should crash