https://bugs.webkit.org/show_bug.cgi?id=70556

Source/WebCore:

Reviewed by Darin Fisher.

Make DPI information accessible from WebKit through
PlatformScreen. This is useful when making scaling
computations on various devices (e.g. Viewport meta tag).

This patch adds DPI plumbing on Chromium Win/Mac/Linux
platforms.

* page/Screen.cpp:
(WebCore::Screen::horizontalDPI):
(WebCore::Screen::verticalDPI):
* page/Screen.h:
* platform/PlatformScreen.h:
* platform/chromium/PlatformScreenChromium.cpp:
(WebCore::screenHorizontalDPI):
(WebCore::screenVerticalDPI):
* platform/chromium/PlatformSupport.h:
* platform/efl/PlatformScreenEfl.cpp:
(WebCore::screenHorizontalDPI):
(WebCore::screenVerticalDPI):
* platform/gtk/PlatformScreenGtk.cpp:
(WebCore::screenHorizontalDPI):
(WebCore::screenVerticalDPI):
* platform/mac/PlatformScreenMac.mm:
(WebCore::screenHorizontalDPI):
(WebCore::screenVerticalDPI):
* platform/qt/PlatformScreenQt.cpp:
(WebCore::screenHorizontalDPI):
(WebCore::screenVerticalDPI):
* platform/win/PlatformScreenWin.cpp:
(WebCore::screenHorizontalDPI):
(WebCore::screenVerticalDPI):

Source/WebKit/chromium:

Reviewed by Darin Fisher.

Make DPI information accessible from WebKit through
PlatformScreen. This is useful when making scaling
computations on various devices (e.g. Viewport meta tag).

This patch adds DPI plumbing on Chromium Win/Mac/Linux
platforms.

* public/WebScreenInfo.h:
(WebKit::WebScreenInfo::WebScreenInfo):
* src/PlatformSupport.cpp:
(WebCore::PlatformSupport::screenHorizontalDPI):
(WebCore::PlatformSupport::screenVerticalDPI):
* src/mac/WebScreenInfoFactory.mm:
(WebKit::WebScreenInfoFactory::screenInfo):
* src/win/WebScreenInfoFactory.cpp:
(WebKit::WebScreenInfoFactory::screenInfo):
* src/x11/WebScreenInfoFactory.cpp:
(WebKit::WebScreenInfoFactory::screenInfo):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@102301 268f45cc-cd09-0410-ab3c-d52691b4dbfc