[DevTools] Use device metrics emulation implemented in content.

Source/core/page/Screen.cpp

Index: Source/core/page/Screen.cpp
diff --git a/Source/core/page/Screen.cpp b/Source/core/page/Screen.cpp
index d5e933110fea500ada18ba82b3d0590578a64a41..a36a8bca8e1fc296e19a6f71aee5e3cfcb601ee3 100644
--- a/Source/core/page/Screen.cpp
+++ b/Source/core/page/Screen.cpp
@@ -48,18 +48,14 @@ unsigned Screen::height() const
 {
     if (!m_frame)
         return 0;
-    long height = static_cast<long>(screenRect(m_frame->view()).height());
-    InspectorInstrumentation::applyScreenHeightOverride(m_frame, &height);
-    return static_cast<unsigned>(height);
+    return static_cast<unsigned>(screenRect(m_frame->view()).height());
 }
 
 unsigned Screen::width() const
 {
     if (!m_frame)
         return 0;
-    long width = static_cast<long>(screenRect(m_frame->view()).width());
-    InspectorInstrumentation::applyScreenWidthOverride(m_frame, &width);
-    return static_cast<unsigned>(width);
+    return static_cast<unsigned>(screenRect(m_frame->view()).width());
 }
 
 unsigned Screen::colorDepth() const