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

gpu/command_buffer/service/image_manager.cc

Index: gpu/command_buffer/service/image_manager.cc
diff --git a/gpu/command_buffer/service/image_manager.cc b/gpu/command_buffer/service/image_manager.cc
index 953e3bcb5731b3b98bfaeef8d6b7bae11c96d376..46438c7058a6efc48a8ab119c18530ed02f06359 100644
--- a/gpu/command_buffer/service/image_manager.cc
+++ b/gpu/command_buffer/service/image_manager.cc
@@ -4,6 +4,7 @@
 
 #include "gpu/command_buffer/service/image_manager.h"
 
+#include "base/logging.h"
 #include "ui/gl/gl_image.h"
 
 namespace gpu {
@@ -15,12 +16,23 @@ ImageManager::ImageManager() {
 ImageManager::~ImageManager() {
 }
 
+void ImageManager::Destroy(bool have_context) {
+  for (GLImageMap::const_iterator iter = images_.begin(); iter != images_.end();
+       ++iter)
+    iter->second.get()->Destroy(have_context);
+  images_.clear();
+}
+
 void ImageManager::AddImage(gfx::GLImage* image, int32 service_id) {
+  DCHECK(images_.find(service_id) == images_.end());
   images_[service_id] = image;
 }
 
 void ImageManager::RemoveImage(int32 service_id) {
-  images_.erase(service_id);
+  GLImageMap::iterator iter = images_.find(service_id);
+  DCHECK(iter != images_.end());
+  iter->second.get()->Destroy(true);
+  images_.erase(iter);
 }
 
 gfx::GLImage* ImageManager::LookupImage(int32 service_id) {