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

ui/gl/gl_image_surface_texture.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gl/gl_image_surface_texture.h"
 
 #include "base/debug/trace_event.h"
 #include "ui/gl/android/surface_texture.h"
 #include "ui/gl/android/surface_texture_tracker.h"
 
 namespace gfx {
 
 GLImageSurfaceTexture::GLImageSurfaceTexture(const gfx::Size& size)
     : size_(size), texture_id_(0) {
 }
 
-GLImageSurfaceTexture::~GLImageSurfaceTexture() { Destroy(); }
+GLImageSurfaceTexture::~GLImageSurfaceTexture() {
+  DCHECK(!surface_texture_);
+  DCHECK_EQ(0u, texture_id_);
+}
 
 bool GLImageSurfaceTexture::Initialize(
     const gfx::GpuMemoryBufferHandle& handle) {
   DCHECK(!surface_texture_);
   surface_texture_ =
       SurfaceTextureTracker::GetInstance()->AcquireSurfaceTexture(
           handle.surface_texture_id.primary_id,
           handle.surface_texture_id.secondary_id);
   return !!surface_texture_;
 }
 
-void GLImageSurfaceTexture::Destroy() {
+void GLImageSurfaceTexture::Destroy(bool have_context) {
   surface_texture_ = NULL;
   texture_id_ = 0;
 }
 
 gfx::Size GLImageSurfaceTexture::GetSize() { return size_; }
 
 bool GLImageSurfaceTexture::BindTexImage(unsigned target) {
   TRACE_EVENT0("gpu", "GLImageSurfaceTexture::BindTexImage");
 
   if (target != GL_TEXTURE_EXTERNAL_OES) {
     LOG(ERROR)
         << "Surface texture can only be bound to TEXTURE_EXTERNAL_OES target";
     return false;
   }
 
   GLint texture_id;
   glGetIntegerv(GL_TEXTURE_BINDING_EXTERNAL_OES, &texture_id);
   DCHECK(texture_id);
 
   if (texture_id_ && texture_id_ != texture_id) {
     LOG(ERROR) << "Surface texture can only be bound to one texture ID";
     return false;
   }
 
-  DCHECK(surface_texture_);
+  if (!surface_texture_) {
+    LOG(ERROR) << "No SurfaceTexture Image memory to bind";

[reveman, 2014/07/24 16:22:03]

"Uninitialized image cannot be bound to texture" and move it to the top of the
function to be more consistent with other implementations.

[sohanjg, 2014/07/25 10:54:22]

Done.

+    return false;
+  }
   if (texture_id != texture_id_) {
     // Note: Surface textures used as gpu memory buffers are created with an
     // initial dummy texture id of 0. We need to call DetachFromGLContext() here
     // to detach from the dummy texture before we can attach to a real texture
     // id. DetachFromGLContext() will delete the texture for the current
     // attachment point so it's important that this is never called when
     // attached to a real texture id. Detaching from the dummy texture id should
     // not cause any problems as the GL should silently ignore 0 when passed to
     // glDeleteTextures.
     DCHECK_EQ(0, texture_id_);
     surface_texture_->DetachFromGLContext();
 
     // This will attach the surface texture to the texture currently bound to
     // GL_TEXTURE_EXTERNAL_OES target.
     surface_texture_->AttachToGLContext();
     texture_id_ = texture_id;
   }
 
   surface_texture_->UpdateTexImage();
   return true;
 }
 
 }  // namespace gfx