https://bugs.webkit.org/show_bug.cgi?id=116729

Reviewed by Tim Horton.

Source/WebKit: 

* WebKit.vcxproj/WebKitExportGenerator/WebKitExports.def.in: Export
three symbols needed to implement the feature.

Source/WebKit/win: 

* WebDatabaseManager.cpp: Update to check preferences for the
desired location of the database store.
(databasesDirectory): Added.
(WebKitInitializeWebDatabasesIfNecessary): Use new databasesDirectory
method to determine what system path to use for file storage.
* WebKit.vcproj/WebKitExports.def.in: Export three symbols
needed to implement the feature.
* WebView.cpp: Update to check preferences for the desired location
of the various caches used by WebKit.
(WebView::setCacheModel): Update to check preferences for URL cache
storage.
(WebKitSetApplicationCachePathIfNecessary): Update to check
preferences for ccache storage.

Tools: 

Update DumpRenderTree to use CFPreferences to control where WebKit
stores its local databases, URL caches, etc.

* DumpRenderTree/win/DumpRenderTree.cpp:
(libraryPathForDumpRenderTree): Added.
(dllLauncherEntryPoint): Set up DRT-specific cache locations.
* Scripts/webkitpy/port/base.py:
(Port._driver_tempdir): Added (to allow port-specific overload).
(Port._driver_tempdir_for_environment): Ditto
* Scripts/webkitpy/port/driver.py:
(Driver._setup_environ_for_driver): Use new overload to set
environment variable.
(Driver._start): Use new overload for temp directory location.
* Scripts/webkitpy/port/win.py:
(WinPort._driver_tempdir_for_environment): New overload to supply
Windows path to DumpRenderTree environment (while still using
cygwin paths for internal operations.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150670 268f45cc-cd09-0410-ab3c-d52691b4dbfc