Added PPB_Graphics3D_Dev::Resize to let plugins resize the backing surface.

content/renderer/gpu/renderer_gl_context.h

 // Copyright (c) 2011 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 API is consistent with other OpenGL setup APIs like window's WGL
 // and pepper's PGL. This API is used to manage OpenGL RendererGLContexts in the
 // Chrome renderer process in a way that is consistent with other platforms.
 
 #ifndef CONTENT_RENDERER_GPU_RENDERER_GL_CONTEXT_H_
 #define CONTENT_RENDERER_GPU_RENDERER_GL_CONTEXT_H_
@@ skipping 35 matching lines @@
   // EGL. Attributes are matched using a closest fit algorithm.
   enum Attribute {
     ALPHA_SIZE     = 0x3021,
     BLUE_SIZE      = 0x3022,
     GREEN_SIZE     = 0x3023,
     RED_SIZE       = 0x3024,
     DEPTH_SIZE     = 0x3025,
     STENCIL_SIZE   = 0x3026,
     SAMPLES        = 0x3031,
     SAMPLE_BUFFERS = 0x3032,
+    HEIGHT         = 0x3056,
+    WIDTH          = 0x3057,
     NONE           = 0x3038  // Attrib list = terminator
   };
 
   // Reasons that a lost context might have been provoked.
   enum ContextLostReason {
     // This context definitely provoked the loss of context.
     kGuilty,
 
     // This context definitely did not provoke the loss of context.
     kInnocent,
@@ skipping 139 matching lines @@
   int32 transfer_buffer_id_;
   gpu::gles2::GLES2Implementation* gles2_implementation_;
   gfx::Size size_;
   Error last_error_;
   int frame_number_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererGLContext);
 };
 
 #endif  // CONTENT_RENDERER_GPU_RENDERER_GL_CONTEXT_H_