During image destroy, delete textures only if we have a GL context.

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 5ca65d0abc062fff7b9c714c8f8397da0fedecc3..e6d5ba6e4a2e4f66aa35fc33ed60baccf7c474e9 100644
--- a/ui/gl/gl_image_ref_counted_memory.cc
+++ b/ui/gl/gl_image_ref_counted_memory.cc
@@ -15,7 +15,7 @@ GLImageRefCountedMemory::GLImageRefCountedMemory(const gfx::Size& size,
 }
 
 GLImageRefCountedMemory::~GLImageRefCountedMemory() {
-  Destroy();
+  DCHECK(!ref_counted_memory_);
 }
 
 bool GLImageRefCountedMemory::Initialize(
@@ -29,8 +29,8 @@ bool GLImageRefCountedMemory::Initialize(
   return true;
 }
 
-void GLImageRefCountedMemory::Destroy() {
-  GLImageMemory::Destroy();
+void GLImageRefCountedMemory::Destroy(bool have_context) {
+  GLImageMemory::Destroy(have_context);
   ref_counted_memory_ = NULL;
 }