Remove SupportsWeakPtr inheritance from GLES2Decoder

gpu/command_buffer/service/gles2_cmd_decoder.h

 // 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.
 
 // This file contains the GLES2Decoder class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 
 #include <stdint.h>
@@ skipping 64 matching lines @@
   bool ext_color_buffer_half_float = false;
   bool oes_texture_float_linear = false;
   bool oes_texture_half_float_linear = false;
 };
 
 typedef base::Callback<void(const std::string& key,
                             const std::string& shader)> ShaderCacheCallback;
 
 // This class implements the AsyncAPIInterface interface, decoding GLES2
 // commands and calling GL.
-class GPU_EXPORT GLES2Decoder : public base::SupportsWeakPtr<GLES2Decoder>,
-                                public CommonDecoder {
+class GPU_EXPORT GLES2Decoder : public CommonDecoder {
  public:
   typedef error::Error Error;
   typedef base::Callback<void(uint64_t release)> FenceSyncReleaseCallback;
   typedef base::Callback<bool(const gpu::SyncToken&)> WaitSyncTokenCallback;
   typedef base::Callback<void(void)> NoParamCallback;
 
   // The default stencil mask, which has all bits set.  This really should be a
   // GLuint, but we can't #include gl_bindings.h in this file without causing
   // macro redefinitions.
   static const unsigned int kDefaultStencilMask;
@@ skipping 22 matching lines @@
 
   bool log_commands() const {
     return log_commands_;
   }
 
   // Set to true to LOG every command.
   void set_log_commands(bool log_commands) {
     log_commands_ = log_commands;
   }
 
+  virtual base::WeakPtr<GLES2Decoder> AsWeakPtr() = 0;
+
   // Initializes the graphics context. Can create an offscreen
   // decoder with a frame buffer that can be referenced from the parent.
   // Takes ownership of GLContext.
   // Parameters:
   //  surface: the GL surface to render to.
   //  context: the GL context to render to.
   //  offscreen: whether to make the context offscreen or not. When FBO 0 is
   //      bound, offscreen contexts render to an internal buffer, onscreen ones
   //      to the surface.
   //  offscreen_size: the size if the GL context is offscreen.
@@ skipping 196 matching lines @@
   bool initialized_;
   bool debug_;
   bool log_commands_;
   DISALLOW_COPY_AND_ASSIGN(GLES2Decoder);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_