Make SharedBitmapIdRegistration move constructor/assignment noexcept

blink::ImageLayerBridge::RegisteredBitmap declares now its move constructor and
assignment operator as noexcept with default implementation. This requires all its
parts to be move constructible and assignable. SharedBitmapIdRegistration was
missing noexcept declarations.

Bug: 819294
Change-Id: I1304e4666141355c61780d69d1669b5c49df4baf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1768616Reviewed-by: enne <enne@chromium.org>
Commit-Queue: José Dapena Paz <jose.dapena@lge.com>
Cr-Commit-Position: refs/heads/master@{#693062}

cc/resources/shared_bitmap_id_registrar.cc

@@ -21,10 +21,10 @@ SharedBitmapIdRegistration::~SharedBitmapIdRegistration() {
 }
 
 SharedBitmapIdRegistration::SharedBitmapIdRegistration(
-    SharedBitmapIdRegistration&&) = default;
+    SharedBitmapIdRegistration&&) noexcept = default;
 
 SharedBitmapIdRegistration& SharedBitmapIdRegistration::operator=(
-    SharedBitmapIdRegistration&& other) {
+    SharedBitmapIdRegistration&& other) noexcept {
   if (layer_ptr_)
     layer_ptr_->UnregisterSharedBitmapId(id_);
   layer_ptr_ = std::move(other.layer_ptr_);

cc/resources/shared_bitmap_id_registrar.h

@@ -50,12 +50,12 @@ class CC_EXPORT SharedBitmapIdRegistration {
  public:
   SharedBitmapIdRegistration();
   SharedBitmapIdRegistration(const SharedBitmapIdRegistration&) = delete;
-  SharedBitmapIdRegistration(SharedBitmapIdRegistration&&);
+  SharedBitmapIdRegistration(SharedBitmapIdRegistration&&) noexcept;
   ~SharedBitmapIdRegistration();
 
   SharedBitmapIdRegistration& operator=(const SharedBitmapIdRegistration&) =
       delete;
-  SharedBitmapIdRegistration& operator=(SharedBitmapIdRegistration&&);
+  SharedBitmapIdRegistration& operator=(SharedBitmapIdRegistration&&) noexcept;
 
  private:
   // Constructed by TextureLayer only, then held by the client as long