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

ui/gl/gl_image_glx.cc

Index: ui/gl/gl_image_glx.cc
diff --git a/ui/gl/gl_image_glx.cc b/ui/gl/gl_image_glx.cc
index 4b7e883781cd8160e6bc6c49d38be238088fc6bd..4cd8c327591985ae99e4dbfa056d86ba9dc0d480 100644
--- a/ui/gl/gl_image_glx.cc
+++ b/ui/gl/gl_image_glx.cc
@@ -49,7 +49,10 @@ GLImageGLX::GLImageGLX(gfx::PluginWindowHandle window)
       pixmap_(0),
       glx_pixmap_(0) {}
 
-GLImageGLX::~GLImageGLX() { Destroy(); }
+GLImageGLX::~GLImageGLX() {
+  DCHECK_EQ(0u, glx_pixmap_);
+  DCHECK_EQ(0u, pixmap_);
+}
 
 bool GLImageGLX::Initialize() {
   if (!GLSurfaceGLX::IsTextureFromPixmapSupported()) {
@@ -98,6 +101,10 @@ bool GLImageGLX::Initialize() {
 
   // Create backing pixmap reference.
   pixmap_ = XCompositeNameWindowPixmap(display_, window_);
+  if (!pixmap_) {
+    LOG(ERROR) << "XCompositeNameWindowPixmap failed.";
+    return false;
+  }
 
   XID root = 0;
   int x = 0;
@@ -109,6 +116,8 @@ bool GLImageGLX::Initialize() {
   if (!XGetGeometry(
           display_, pixmap_, &root, &x, &y, &width, &height, &bw, &depth)) {
     LOG(ERROR) << "XGetGeometry failed for pixmap " << pixmap_ << ".";
+    XFreePixmap(display_, pixmap_);
+    pixmap_ = 0u;
     return false;
   }
 
@@ -119,6 +128,8 @@ bool GLImageGLX::Initialize() {
       glXCreatePixmap(display_, *config.get(), pixmap_, pixmap_attribs);
   if (!glx_pixmap_) {
     LOG(ERROR) << "glXCreatePixmap failed.";
+    XFreePixmap(display_, pixmap_);
+    pixmap_ = 0u;
     return false;
   }
 
@@ -126,7 +137,7 @@ bool GLImageGLX::Initialize() {
   return true;
 }
 
-void GLImageGLX::Destroy() {
+void GLImageGLX::Destroy(bool have_context) {
   if (glx_pixmap_) {
     glXDestroyGLXPixmap(display_, glx_pixmap_);
     glx_pixmap_ = 0;