TextureImageTransportSurface: Don't recreate the backbuffer on Resize if it's supposed to be discar…

content/common/gpu/texture_image_transport_surface.cc

 // Copyright (c) 2012 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 "content/common/gpu/texture_image_transport_surface.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 143 matching lines @@
 void* TextureImageTransportSurface::GetConfig() {
   return surface_.get() ? surface_->GetConfig() : NULL;
 }
 
 void TextureImageTransportSurface::OnResize(gfx::Size size,
                                             float scale_factor) {
   DCHECK_GE(size.width(), 1);
   DCHECK_GE(size.height(), 1);
   current_size_ = size;
   scale_factor_ = scale_factor;
-  CreateBackTexture();
+  if (backbuffer_suggested_allocation_)
+    CreateBackTexture();
 }
 
 void TextureImageTransportSurface::OnWillDestroyStub() {
   DCHECK(helper_->stub()->decoder()->GetGLContext()->IsCurrent(NULL));
   helper_->stub()->RemoveDestructionObserver(this);
 
   // We are losing the stub owning us, this is our last chance to clean up the
   // resources we allocated in the stub's context.
   ReleaseBackTexture();
   ReleaseFrontTexture();
@@ skipping 275 matching lines @@
 
 #ifndef NDEBUG
   GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER);
   if (status != GL_FRAMEBUFFER_COMPLETE) {
     DLOG(FATAL) << "Framebuffer incomplete: " << status;
   }
 #endif
 }
 
 }  // namespace content