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

ui/gl/gl_image_surface_texture.cc

Index: ui/gl/gl_image_surface_texture.cc
diff --git a/ui/gl/gl_image_surface_texture.cc b/ui/gl/gl_image_surface_texture.cc
index 8d0a0e7e22b0476da7157aeae8c0a106bbcd1a96..55aecc7a421f66590f98eaaf87c2e4f75c208c41 100644
--- a/ui/gl/gl_image_surface_texture.cc
+++ b/ui/gl/gl_image_surface_texture.cc
@@ -13,7 +13,9 @@ namespace gfx {
 GLImageSurfaceTexture::GLImageSurfaceTexture(gfx::Size size)
     : size_(size), texture_id_(0) {}
 
-GLImageSurfaceTexture::~GLImageSurfaceTexture() { Destroy(); }
+GLImageSurfaceTexture::~GLImageSurfaceTexture() {
+  Destroy(false);

[reveman, 2014/05/29 16:30:34]

No call to Destroy in dtor please. Instead verify that Destroy has been called.

+}
 
 bool GLImageSurfaceTexture::Initialize(gfx::GpuMemoryBufferHandle buffer) {
   DCHECK(!surface_texture_);
@@ -24,7 +26,7 @@ bool GLImageSurfaceTexture::Initialize(gfx::GpuMemoryBufferHandle buffer) {
   return !!surface_texture_;
 }
 
-void GLImageSurfaceTexture::Destroy() {
+void GLImageSurfaceTexture::Destroy(bool have_context) {
   surface_texture_ = NULL;
   texture_id_ = 0;
 }