Enabled using viewport on desktop browsers behind experimental flag

Source/WebKit/chromium/public/WebSettings.h

Index: Source/WebKit/chromium/public/WebSettings.h
diff --git a/Source/WebKit/chromium/public/WebSettings.h b/Source/WebKit/chromium/public/WebSettings.h
index d5a8bca8b0e296d4f1a71398c84d708abce35115..e48f4a80ac7771ad648da1f67c24eaefa02788ae 100644
--- a/Source/WebKit/chromium/public/WebSettings.h
+++ b/Source/WebKit/chromium/public/WebSettings.h
@@ -52,6 +52,8 @@ public:
         EditingBehaviorAndroid
     };
 
+    virtual bool desktopViewportEnabled() const = 0;

[Rick Byers, 2013/06/04 00:25:30]

how does the semantics of this differ from viewportEnabled?  I.e. would you
expect ChromeOS to set all 3 of these flag (viewportEnabled,
desktopViewportEnabled AND deviceSupportsRotation) or some subset of them?

[bokan, 2013/06/04 18:52:16]

desktopViewportEnabled turns on viewportEnabled but all the layout resizing I
added is behind desktopViewportEnabled so that none of the Android behaviour
changes. I didn't realize that rotation happened on anything but Android. I'm
not sure what we want to do with rotation on CrOS but if we want to support
rotation behaviour like Android (so that the viewport gets appropriately
rescaled) we'll need some additional signal that a resize came from a rotation.
Enabling rotation on CrOS right now means resizing a window causes inappropriate
scaling rather than creating scrollbars.

[Rick Byers, 2013/06/05 15:04:08]

I think it's fine to treat rotation the same as normal window resize on CrOS. 
So I think this is mostly about picking better names for the setting.  Try to
focus the settings on the behavior that's affected, as opposed to properties of
the embedder.  Maybe it's 'resizePreservesViewportWidth' or something like that?

[bokan, 2013/06/06 19:43:47]

Changed it to resizeAffectsLayoutWidth

+    virtual bool deviceSupportsRotation() const = 0;
     virtual bool scrollAnimatorEnabled() const = 0;
     virtual bool touchEditingEnabled() const = 0;
     virtual bool viewportEnabled() const = 0;
@@ -89,7 +91,9 @@ public:
     virtual void setDefaultVideoPosterURL(const WebString&) = 0;
     void setDeferred2dCanvasEnabled(bool) { } // temporary stub
     virtual void setDeferredImageDecodingEnabled(bool) = 0;
+    virtual void setDesktopViewportEnabled(bool) = 0;
     virtual void setDeviceSupportsMouse(bool) = 0;
+    virtual void setDeviceSupportsRotation(bool) = 0;
     virtual void setDeviceSupportsTouch(bool) = 0;
     virtual void setDoubleTapToZoomEnabled(bool) = 0;
     virtual void setDownloadableBinaryFontsEnabled(bool) = 0;