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

ui/gl/gl_image_shm.cc

 // Copyright 2013 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_shm.h"
 
 #include "base/debug/trace_event.h"
 #include "base/process/process_handle.h"
 #include "ui/gl/scoped_binders.h"
 
@@ skipping 61 matching lines @@
       internalformat_(internalformat)
 #if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || \
     defined(USE_OZONE)
       ,
       egl_texture_id_(0u),
       egl_image_(EGL_NO_IMAGE_KHR)
 #endif
 {
 }
 
-GLImageShm::~GLImageShm() { Destroy(); }
+GLImageShm::~GLImageShm() {
+  DCHECK(!shared_memory_);
+#if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || \
+    defined(USE_OZONE)
+  DCHECK_EQ(EGL_NO_IMAGE_KHR, egl_image_);
+  DCHECK_EQ(0u, egl_texture_id_);
+#endif
+}
 
 bool GLImageShm::Initialize(gfx::GpuMemoryBufferHandle buffer) {
   if (!ValidFormat(internalformat_)) {
     DVLOG(0) << "Invalid format: " << internalformat_;
     return false;
   }
 
   if (!base::SharedMemory::IsHandleValid(buffer.handle))
     return false;
 
   base::SharedMemory shared_memory(buffer.handle, true);
 
   // Duplicate the handle.
   base::SharedMemoryHandle duped_shared_memory_handle;
   if (!shared_memory.ShareToProcess(base::GetCurrentProcessHandle(),
                                     &duped_shared_memory_handle)) {
     DVLOG(0) << "Failed to duplicate shared memory handle.";
     return false;
   }
 
   shared_memory_.reset(
       new base::SharedMemory(duped_shared_memory_handle, true));
   return true;
 }
 
-void GLImageShm::Destroy() {
+void GLImageShm::Destroy(bool have_context) {
+  shared_memory_.reset();

[reveman, 2014/06/02 16:45:29]

nit: please be consistent with blank lines around "#if def". ie. no blank line
in dtor then no blank line here

[sohanjg, 2014/06/03 05:48:33]

Done.

+
 #if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || \
     defined(USE_OZONE)
   if (egl_image_ != EGL_NO_IMAGE_KHR) {
     eglDestroyImageKHR(GLSurfaceEGL::GetHardwareDisplay(), egl_image_);
     egl_image_ = EGL_NO_IMAGE_KHR;
   }
 
   if (egl_texture_id_) {
-    glDeleteTextures(1, &egl_texture_id_);
+    if (have_context)
+      glDeleteTextures(1, &egl_texture_id_);
     egl_texture_id_ = 0u;
   }
 #endif
 }
 
 gfx::Size GLImageShm::GetSize() { return size_; }
 
 bool GLImageShm::BindTexImage(unsigned target) {
   TRACE_EVENT0("gpu", "GLImageShm::BindTexImage");
   DCHECK(shared_memory_);
@@ skipping 74 matching lines @@
                0,  // border
                DataFormat(internalformat_),
                DataType(internalformat_),
                shared_memory_->memory());
 
   shared_memory_->Unmap();
   return true;
 }
 
 }  // namespace gfx