Initialize |show_error_dialog_| bool variable before it is used.
Initialize |show_error_dialog_| bool variable before it is used.

BUG=95589
TEST=Valgrind should go green when you run ./tools/valgrind/valgrind.sh out/Debug/ui_tests
--gtest_filter=SearchProviderTest.TestIsSearchProviderInstalled

Review URL: http://codereview.chromium.org/7838011

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@99970 0039d316-1c4b-4281-b951-d872f2087c98

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