[WK2] Rename SetFrameInViewSourceMode to SetMainFrameInViewSourceMode
https://bugs.webkit.org/show_bug.cgi?id=105885

Reviewed by Martin Robinson.

This way we don't depend on a WebFrameProxy and
webkit_web_view_set_view_mode() works even if the main frame proxy
hasn't been created yet.

* UIProcess/API/gtk/WebKitWebView.cpp:
(webkit_web_view_set_view_mode): Call
WebPageProxy::setMainFrameInViewSourceMode() directly.
* UIProcess/WebFrameProxy.cpp:
(WebKit::WebFrameProxy::WebFrameProxy): Remove
setInViewSourceMode().
* UIProcess/WebFrameProxy.h:
(WebFrameProxy):
* UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::setMainFrameInViewSourceMode):
* UIProcess/WebPageProxy.h:
(WebPageProxy):
* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::setMainFrameInViewSourceMode):
* WebProcess/WebPage/WebPage.h:
(WebPage):
* WebProcess/WebPage/WebPage.messages.in:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@138622 268f45cc-cd09-0410-ab3c-d52691b4dbfc