https://bugs.webkit.org/show_bug.cgi?id=56022

Reviewed by Oliver Hunt and Brian Weinstein.

Add a parameter to WKContextClearResourceCaches to specify whether to clear all the caches
or just the memory caches.

* Shared/ResourceCachesToClear.h: Added.
* UIProcess/API/C/WKAPICast.h:
(WebKit::toResourceCachesToClear):

* UIProcess/API/C/WKContext.cpp:
(WKContextClearResourceCaches):
Add the new parameter.
* UIProcess/API/C/WKContext.h:
* UIProcess/WebContext.cpp:
(WebKit::WebContext::clearResourceCaches):
Ditto.
* UIProcess/WebContext.h:

* WebProcess/WebProcess.cpp:
(WebKit::WebProcess::clearResourceCaches):
Pass the new parameter through to the platform-specific functions.
* WebProcess/WebProcess.h:
Add the new parameter and give it a default of AllResourceCaches.
* WebProcess/WebProcess.messages.in:
Ditto.
* WebProcess/gtk/WebProcessGtk.cpp:
(WebKit::WebProcess::platformClearResourceCaches):
Ditto.
* WebProcess/qt/WebProcessQt.cpp:
(WebKit::WebProcess::platformClearResourceCaches):
Ditto.
* WebProcess/win/WebProcessWin.cpp:
(WebKit::WebProcess::platformClearResourceCaches):
When told to clear only the in-memory caches, return early so as not to clear the CFNetwork
disk cache.
* WebProcess/mac/WebProcessMac.mm:
(WebKit::WebProcess::platformClearResourceCaches):
Ditto.

* WebKit2.xcodeproj/project.pbxproj:
Add ResourceCachesToClear.h
* win/WebKit2.vcproj:
Ditto.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@80753 268f45cc-cd09-0410-ab3c-d52691b4dbfc