Add glDrawBuffer(s) to GrGLInterface

Review URL: http://codereview.appspot.com/4841046/



git-svn-id: http://skia.googlecode.com/svn/trunk@2032 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/win/GrGLDefaultInterface_win.cpp b/gpu/src/win/GrGLDefaultInterface_win.cpp
index ac4552a..05f5414 100644
--- a/gpu/src/win/GrGLDefaultInterface_win.cpp
+++ b/gpu/src/win/GrGLDefaultInterface_win.cpp
@@ -57,6 +57,7 @@
             gDefaultInterface.fDisable = glDisable;
             gDefaultInterface.fDisableClientState = glDisableClientState;
             gDefaultInterface.fDrawArrays = glDrawArrays;
+            gDefaultInterface.fDrawBuffer = glDrawBuffer;
             gDefaultInterface.fDrawElements = glDrawElements;
             gDefaultInterface.fEnable = glEnable;
             gDefaultInterface.fEnableClientState = glEnableClientState;
@@ -102,6 +103,7 @@
             GR_GL_GET_PROC(DeleteProgram);
             GR_GL_GET_PROC(DeleteShader);
             GR_GL_GET_PROC(DisableVertexAttribArray);
+            GR_GL_GET_PROC(DrawBuffers);
             GR_GL_GET_PROC(EnableVertexAttribArray);
             GR_GL_GET_PROC(GenBuffers);
             GR_GL_GET_PROC(GetBufferParameteriv);