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ajwong@chromium.org authored
This is needed to allow the callback system to perform implicit conversions from the task result to the argument's call. Otherwise, the template resolution will force exact equality between the return type of the task and the reply's argument type which is too strict. For example, you wouldn't be able to take a const int & when returning an int. Also remove some DCHECKs that can't happen. BUG=159114 Review URL: https://chromiumcodereview.appspot.com/11369061 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@169825 0039d316-1c4b-4281-b951-d872f2087c98
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