cc: Remove redundant is_overlay arguments

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 7e4dd29708ccd4e61b3dafcc2306a4be1cdfccef..24f6e5ea2612747ba8c529dcd6e82d5b31718853 100644
--- a/cc/resources/texture_mailbox.cc
+++ b/cc/resources/texture_mailbox.cc
@@ -15,37 +15,35 @@ TextureMailbox::TextureMailbox() : shared_bitmap_(NULL) {
 TextureMailbox::TextureMailbox(const gpu::MailboxHolder& mailbox_holder)
     : mailbox_holder_(mailbox_holder),
       shared_bitmap_(NULL),
-      allow_overlay_(false),
-      nearest_neighbor_(false) {
-}
+      bound_to_gl_image_(false),
+      nearest_neighbor_(false) {}
 
 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
                                uint32 target,
                                uint32 sync_point)
     : mailbox_holder_(mailbox, target, sync_point),
       shared_bitmap_(NULL),
-      allow_overlay_(false),
-      nearest_neighbor_(false) {
-}
+      bound_to_gl_image_(false),
+      nearest_neighbor_(false) {}
 
 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
                                uint32 target,
                                uint32 sync_point,
                                const gfx::Size& size_in_pixels,
-                               bool allow_overlay)
+                               bool bound_to_gl_image)
     : mailbox_holder_(mailbox, target, sync_point),
       shared_bitmap_(nullptr),
       size_in_pixels_(size_in_pixels),
-      allow_overlay_(allow_overlay),
+      bound_to_gl_image_(bound_to_gl_image),
       nearest_neighbor_(false) {
-  DCHECK_IMPLIES(allow_overlay, !size_in_pixels.IsEmpty());
+  DCHECK_IMPLIES(bound_to_gl_image, !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),
-      allow_overlay_(false),
+      bound_to_gl_image_(false),
       nearest_neighbor_(false) {
   // If an embedder of cc gives an invalid TextureMailbox, we should crash
   // here to identify the offender.