Convert plugin and GPU process to brokered handle duplication.

BUG=119250
Review URL: https://chromiumcodereview.appspot.com/9958034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@132303 0039d316-1c4b-4281-b951-d872f2087c98
void GpuChannel::AppendAllCommandBufferStubs(
    std::vector<GpuCommandBufferStubBase*>& stubs) {
  for (StubMap::Iterator<GpuCommandBufferStub> it(&stubs_);
      !it.IsAtEnd(); it.Advance()) {
    stubs.push_back(it.GetCurrentValue());
  }
}

void GpuChannel::AppendAllCommandBufferStubs(
    std::vector<GpuCommandBufferStubBase*>& stubs) {
  for (StubMap::Iterator<GpuCommandBufferStub> it(&stubs_);
      !it.IsAtEnd(); it.Advance()) {
    stubs.push_back(it.GetCurrentValue());
  }
}
