Drag-and-drop: Move startDrag out of WebView/RenderView.

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index 6948db4991a46e1b9a1f312a5bdc7f1f9a3e2079..26d2ddbfdd94d3d53013fed82387c3ec555de5af 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -11,8 +11,11 @@
 
 #include "build/build_config.h"
 #include "content/common/content_export.h"
+#include "content/common/drag_event_source_info.h"
 #include "content/public/browser/renderer_unresponsive_type.h"
+#include "content/public/common/drop_data.h"
 #include "third_party/WebKit/public/platform/WebDisplayMode.h"
+#include "third_party/WebKit/public/platform/WebDragOperation.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ -32,6 +35,7 @@ namespace content {
 class BrowserAccessibilityManager;
 class RenderWidgetHostImpl;
 class RenderWidgetHostInputEventRouter;
+class RenderViewHostImpl;
 class TextInputManager;
 struct ScreenInfo;
 struct NativeWebKeyboardEvent;
@@ -204,6 +208,9 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // this RenderWidgetHost.
   virtual bool IsHidden();
 
+  // Returns the associated RenderViewHostImpl*, if possible.
+  virtual RenderViewHostImpl* GetRenderViewHost() const;
+
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };