Remove GLImage::Destroy().

ui/gl/gl_image_shared_memory.cc

Index: ui/gl/gl_image_shared_memory.cc
diff --git a/ui/gl/gl_image_shared_memory.cc b/ui/gl/gl_image_shared_memory.cc
index f4b080eec9856cebf025b5772f80c2ca98aaf9b5..83c8e5eba5388c0585072fa87a2c80f51699f499 100644
--- a/ui/gl/gl_image_shared_memory.cc
+++ b/ui/gl/gl_image_shared_memory.cc
@@ -20,9 +20,7 @@ GLImageSharedMemory::GLImageSharedMemory(const gfx::Size& size,
                                          unsigned internalformat)
     : GLImageMemory(size, internalformat) {}
 
-GLImageSharedMemory::~GLImageSharedMemory() {
-  DCHECK(!shared_memory_);
-}
+GLImageSharedMemory::~GLImageSharedMemory() {}
 
 bool GLImageSharedMemory::Initialize(
     const base::SharedMemoryHandle& handle,
@@ -72,11 +70,6 @@ bool GLImageSharedMemory::Initialize(
   return true;
 }
 
-void GLImageSharedMemory::Destroy(bool have_context) {
-  GLImageMemory::Destroy(have_context);
-  shared_memory_.reset();
-}
-
 void GLImageSharedMemory::OnMemoryDump(
     base::trace_event::ProcessMemoryDump* pmd,
     uint64_t process_tracing_id,