Re-land r84928: Move ExtensionFunctionDispatcher to
ExtensionTabHelper.

This reverts commit 89a6b9d9232949a01b8263779fa819ed4d5b3089.

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git-svn-id: svn://svn.chromium.org/chrome/trunk/src@85076 0039d316-1c4b-4281-b951-d872f2087c98
39 files changed