Remove GLImage::Destroy().

ui/gl/gl_image_ref_counted_memory.cc

Index: ui/gl/gl_image_ref_counted_memory.cc
diff --git a/ui/gl/gl_image_ref_counted_memory.cc b/ui/gl/gl_image_ref_counted_memory.cc
index eb93e3fd37b3b32f0b09ada5107ad42c9811adb7..327d0e64e7a2fd14913eb6f220151b4eb8b9b91a 100644
--- a/ui/gl/gl_image_ref_counted_memory.cc
+++ b/ui/gl/gl_image_ref_counted_memory.cc
@@ -19,9 +19,7 @@ GLImageRefCountedMemory::GLImageRefCountedMemory(const gfx::Size& size,
                                                  unsigned internalformat)
     : GLImageMemory(size, internalformat) {}
 
-GLImageRefCountedMemory::~GLImageRefCountedMemory() {
-  DCHECK(!ref_counted_memory_.get());
-}
+GLImageRefCountedMemory::~GLImageRefCountedMemory() {}
 
 bool GLImageRefCountedMemory::Initialize(
     base::RefCountedMemory* ref_counted_memory,
@@ -37,11 +35,6 @@ bool GLImageRefCountedMemory::Initialize(
   return true;
 }
 
-void GLImageRefCountedMemory::Destroy(bool have_context) {
-  GLImageMemory::Destroy(have_context);
-  ref_counted_memory_ = nullptr;
-}
-
 void GLImageRefCountedMemory::OnMemoryDump(
     base::trace_event::ProcessMemoryDump* pmd,
     uint64_t process_tracing_id,