Web Inspector: Refactor searching in inspector, add test (fixed non regex search).

Web Inspector: Refactor searching in inspector, add test (fixed non regex search).
https://bugs.webkit.org/show_bug.cgi?id=68930

Reviewed by Yury Semikhatsky.

Source/WebCore:

Search moved out from page agent.
Fixed search for non regex case which is not yet used.

Test: http/tests/inspector/search/search-in-resources.html

* CMakeLists.txt:
* GNUmakefile.list.am:
* WebCore.gypi:
* WebCore.pro:
* WebCore.vcproj/WebCore.vcproj:
* WebCore.xcodeproj/project.pbxproj:
* inspector/ContentSearchUtils.cpp: Added.
(WebCore::ContentSearchUtils::createSearchRegexSource):
(WebCore::ContentSearchUtils::createSearchRegex):
(WebCore::ContentSearchUtils::countRegularExpressionMatches):
* inspector/ContentSearchUtils.h: Added.
* inspector/InspectorPageAgent.cpp:
(WebCore::hasTextContent):
(WebCore::InspectorPageAgent::cachedResourceContent):
(WebCore::textContentForCachedResource):
(WebCore::buildObjectForSearchResult):
(WebCore::InspectorPageAgent::searchInResources):
* inspector/front-end/utilities.js:
():

LayoutTests:

* http/tests/inspector/search/resources/search.css: Added.
(div.searchTestUniqueString):
(div.searchTestUniqueString:hover):
* http/tests/inspector/search/resources/search.html: Added.
* http/tests/inspector/search/resources/search.js: Added.
(searchTestUniqueString):
(doSomething):
* http/tests/inspector/search/search-in-resources-expected.txt: Added.
* http/tests/inspector/search/search-in-resources.html: Added.
* http/tests/inspector/search/search-test.js: Added.
(initialize_SearchTest.InspectorTest.dumpSearchResults):
(initialize_SearchTest):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@96215 268f45cc-cd09-0410-ab3c-d52691b4dbfc