Enabled using viewport on desktop browsers behind experimental flag

Source/core/rendering/RenderView.cpp

Index: Source/core/rendering/RenderView.cpp
diff --git a/Source/core/rendering/RenderView.cpp b/Source/core/rendering/RenderView.cpp
index 89e7169c5c08d83d5b18c51f9839b8b1b81cc380..0919483c436d4cd88474d19584261576624e7b01 100644
--- a/Source/core/rendering/RenderView.cpp
+++ b/Source/core/rendering/RenderView.cpp
@@ -28,6 +28,7 @@
 #include "core/page/Frame.h"
 #include "core/page/FrameView.h"
 #include "core/page/Page.h"
+#include "core/page/Settings.h"
 #include "core/platform/graphics/filters/custom/CustomFilterGlobalContext.h"
 #include "core/platform/graphics/FloatQuad.h"
 #include "core/platform/graphics/GraphicsContext.h"
@@ -950,6 +951,16 @@ bool RenderView::rootBackgroundIsEntirelyFixed() const
     return rootRenderer->hasEntirelyFixedBackground();
 }
 
+bool RenderView::useDesktopStyleLayout() const
+{
+    Page* page = document()->page();
+
+    if (!page)
+        return false;
+
+    return !page->settings()->layoutFallbackWidth();
+}
+
 LayoutRect RenderView::backgroundRect(RenderBox* backgroundRenderer) const
 {
     if (!hasColumns())
@@ -977,8 +988,9 @@ int RenderView::viewHeight() const
     int height = 0;
     if (!shouldUsePrintingLayout() && m_frameView) {
         height = m_frameView->layoutHeight();
-        height = m_frameView->useFixedLayout() ? ceilf(style()->effectiveZoom() * float(height)) : height;

[aelias_OOO_until_Jul13, 2013/07/31 22:31:21]

This is a legacy of one of the other WebKit ports, since Chrome for Android
never used effectiveZoom().  So I suggest trying to just delete these lines.

+        height = !useDesktopStyleLayout() ? ceilf(style()->effectiveZoom() * float(height)) : height;
     }
+
     return height;
 }
 
@@ -987,8 +999,9 @@ int RenderView::viewWidth() const
     int width = 0;
     if (!shouldUsePrintingLayout() && m_frameView) {
         width = m_frameView->layoutWidth();
-        width = m_frameView->useFixedLayout() ? ceilf(style()->effectiveZoom() * float(width)) : width;
+        width = !useDesktopStyleLayout() ? ceilf(style()->effectiveZoom() * float(width)) : width;
     }
+
     return width;
 }