Convert find_in_page.py pyauto test to a browser_test. I skipped test cases...

Convert find_in_page.py pyauto test to a browser_test. I skipped test cases that were duplicated in existing tests (i.e. pdf searching which is already in pdf_browsertest.cc, and basic searching\case-sensitive).

I converted the looping and timing to instead hop to the history thread and back, which should make things less flaky.

BUG=143637
Review URL: https://chromiumcodereview.appspot.com/10827395

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152329 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/functional/PYAUTO_TESTS

@@ -49,7 +49,6 @@
       'downloads',
       'execute_javascript',
       'extensions',
-      'find_in_page',
       'flash',
       'fullscreen_mouselock',
       'history',
@@ -360,8 +359,6 @@
       '-extensions.ExtensionsTest.testAllowAccessFileURLs',
       '-extensions.ExtensionsTest.testAllowIncognitoExtension',
       '-extensions.ExtensionsTest.testDisableEnableExtension',
-      # Need internal data dirs in autotest package. crosbug.com/6855
-      '-find_in_page.FindMatchTests.testSearchInPDF',
       # crbug.com/134593
       '-gtalk.test_basic.BasicTest.testCurrentVersion',
       '-gtalk.test_basic.BasicTest.testRCVersion',