Don't map internalFormat in renderbufferStorage() in embedded envrionment.

BUG=none
TEST=Run webkit layout test fast/canvas/webgl/framebuffer_test.html in embedded environment. 

Review URL: http://codereview.chromium.org/6365006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72299 0039d316-1c4b-4281-b951-d872f2087c98

webkit/gpu/webgraphicscontext3d_in_process_impl.cc

@@ -1310,6 +1310,7 @@ void WebGraphicsContext3DInProcessImpl::renderbufferStorage(
     unsigned long width,
     unsigned long height) {
   makeContextCurrent();
+  if (!is_gles2_) {
     switch (internalformat) {
     case GL_DEPTH_STENCIL:
       internalformat = GL_DEPTH24_STENCIL8_EXT;
@@ -1325,6 +1326,7 @@ void WebGraphicsContext3DInProcessImpl::renderbufferStorage(
       internalformat = GL_RGB;
       break;
     }
+  }
   glRenderbufferStorageEXT(target, internalformat, width, height);
 }