[DevTools] Introduced WebDeviceEmulationParams.

BUG=327641
TBR=pfeldman@chromium.org

Review URL: https://codereview.chromium.org/222173002

git-svn-id: svn://svn.chromium.org/blink/trunk@170670 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/public/web/WebDevToolsAgentClient.h

@@ -36,6 +36,7 @@
 
 namespace blink {
 class WebString;
+struct WebDeviceEmulationParams;
 struct WebDevToolsMessageData;
 struct WebRect;
 struct WebSize;
@@ -99,6 +100,9 @@ public:
         const WebRect& screenRect, const WebRect& viewRect,
         float deviceScaleFactor, bool fitToView) { }
 
+    // Enables device emulation as specified in params.
+    virtual void enableDeviceEmulation(const WebDeviceEmulationParams& params) { }
+
     // Cancel emulation started via |enableDeviceEmulation| call.
     virtual void disableDeviceEmulation() { }
 

third_party/WebKit/public/web/WebDeviceEmulationParams.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WebDeviceEmulationParams_h
+#define WebDeviceEmulationParams_h
+
+#include "public/platform/WebRect.h"
+#include "public/platform/WebSize.h"
+
+namespace blink {
+
+// All sizes are measured in device independent pixels.
+struct WebDeviceEmulationParams {
+    // For mobile, screen has the same size as view, which is positioned at (0;0).
+    // For desktop, screen size and view position are preserved.
+    enum ScreenPosition {
+        Desktop,
+        Mobile
+    };
+
+    ScreenPosition screenPosition;
+
+    // If zero, the original device scale factor is preserved.
+    float deviceScaleFactor;
+
+    // Emulated view size. Empty size means no override.
+    WebSize viewSize;
+
+    // Whether emulated view should be scaled down if necessary to fit into available space.
+    bool fitToView;
+
+    // Insets of emulated view inside available view space, in fit to view mode.
+    WebSize viewInsets;
+
+    WebDeviceEmulationParams()
+        : screenPosition(Desktop)
+        , deviceScaleFactor(0)
+        , fitToView(false) { }
+};
+
+} // namespace blink
+
+#endif