Added an abstract Renderer::clear method.

TRAC #22041

Unimplemented in Renderer11 and Renderer9 only forces the depth stencil state
to reset.

Signed-off-by: Shannon Woods
Signed-off-by: Daniel Koch

Author:    Geoff Lang

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1423 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index c31ef56..5a86217 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -269,6 +269,13 @@
     UNIMPLEMENTED();
 }
 
+void Renderer11::clear(GLbitfield mask, const gl::Color &colorClear, float depthClear, int stencilClear,
+                       gl::Framebuffer *frameBuffer)
+{
+    // TODO
+    UNIMPLEMENTED();
+}
+
 void Renderer11::releaseDeviceResources()
 {
     // TODO