Coverity: Fix null dereference in WebPluginDelegatePepper::Device3DInitializeContext error case.

chrome/renderer/webplugin_delegate_pepper.cc

 // Copyright (c) 2010 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.
 
 #define PEPPER_APIS_ENABLED 1
 
 #include "chrome/renderer/webplugin_delegate_pepper.h"
 
 #include <string>
 #include <vector>
@@ skipping 701 matching lines @@
         SendNestedDelegateGeometryToBrowser(window_rect_, clip_rect_);
 
         // Save the implementation information (the CommandBuffer).
         Device3DImpl* impl = new Device3DImpl;
         impl->command_buffer = command_buffer_;
         impl->dynamically_created = false;
         context->reserved = impl;
 
         return NPERR_NO_ERROR;
       }
+
+      nested_delegate_->DestroyCommandBuffer(command_buffer_);
+      command_buffer_ = NULL;
     }
-
-    nested_delegate_->DestroyCommandBuffer(command_buffer_);
-    command_buffer_ = NULL;
   }
 
   nested_delegate_->PluginDestroyed();
   nested_delegate_ = NULL;
 #endif  // ENABLE_GPU
 
   return NPERR_GENERIC_ERROR;
 }
 
 NPError WebPluginDelegatePepper::Device3DSetStateContext(
@@ skipping 1013 matching lines @@
   bounds.origin.x = dest_rect.x();
   bounds.origin.y = canvas_height - dest_rect.y() - dest_rect.height();
   bounds.size.width = dest_rect.width();
   bounds.size.height = dest_rect.height();
 
   CGContextDrawImage(canvas, bounds, image);
   CGContextRestoreGState(canvas);
 }
 #endif  // defined(OS_MACOSX)