Exposed support for dynamically enabling extensions in command buffer...

chrome/renderer/webgraphicscontext3d_command_buffer_impl.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.
 
 #if defined(ENABLE_GPU)
 
 #include "chrome/renderer/webgraphicscontext3d_command_buffer_impl.h"
 
 #include <GLES2/gl2.h>
 #ifndef GL_GLEXT_PROTOTYPES
@@ skipping 72 matching lines @@
     ggl::GGL_DEPTH_SIZE, depth_size,
     ggl::GGL_STENCIL_SIZE, stencil_size,
     ggl::GGL_SAMPLES, samples,
     ggl::GGL_SAMPLE_BUFFERS, sample_buffers,
     ggl::GGL_NONE,
   };
 
   GPUInfo gpu_info = host->gpu_info();
   UMA_HISTOGRAM_ENUMERATION(
       "GPU.WebGraphicsContext3D_Init_CanLoseContext",
-      attributes.canRecoverFromContextLoss * 2 + gpu_info.can_lose_context(), 
+      attributes.canRecoverFromContextLoss * 2 + gpu_info.can_lose_context(),
       4);
   if (attributes.canRecoverFromContextLoss == false) {
     if (gpu_info.can_lose_context())
       return false;
   }
 
   if (render_directly_to_web_view) {
     RenderView* renderview = RenderView::FromWebView(web_view);
     if (!renderview)
       return false;
@@ skipping 260 matching lines @@
 void WebGraphicsContext3DCommandBufferImpl::unmapTexSubImage2DCHROMIUM(
     const void* mem) {
   glUnmapTexSubImage2DCHROMIUM(mem);
 }
 
 void WebGraphicsContext3DCommandBufferImpl::copyTextureToParentTextureCHROMIUM(
     unsigned texture, unsigned parentTexture) {
   copyTextureToCompositor(texture, parentTexture);
 }
 
+WebKit::WebString WebGraphicsContext3DCommandBufferImpl::
+    getRequestableExtensionsCHROMIUM() {
+  return WebKit::WebString::fromUTF8(glGetRequestableExtensionsCHROMIUM());
+}
+
+void WebGraphicsContext3DCommandBufferImpl::requestExtensionCHROMIUM(
+    const char* extension) {
+  glRequestExtensionCHROMIUM(extension);
+}
+
 // Helper macros to reduce the amount of code.
 
 #define DELEGATE_TO_GL(name, glname)                                    \
 void WebGraphicsContext3DCommandBufferImpl::name() {                    \
   makeContextCurrent();                                                 \
   gl##glname();                                                         \
 }
 
 #define DELEGATE_TO_GL_1(name, glname, t1)                              \
 void WebGraphicsContext3DCommandBufferImpl::name(t1 a1) {               \
@@ skipping 628 matching lines @@
 }
 
 void WebGraphicsContext3DCommandBufferImpl::copyTextureToCompositor(
     unsigned texture, unsigned parentTexture) {
   makeContextCurrent();
   glCopyTextureToParentTextureCHROMIUM(texture, parentTexture);
   glFlush();
 }
 
 #endif  // defined(ENABLE_GPU)