blink: Remove unused or rarely used methods from WebGraphicsContext3D

third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp

Index: third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
index 3b361f746c2ebcadb469d079792daf0914daeaff..3b999e84e1c68cab5e4b4c4dcb822cc1b3eb9020 100644
--- a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
@@ -205,6 +205,12 @@ WebGraphicsContext3D* DrawingBuffer::context()
     return m_context.get();
 }
 
+gpu::gles2::GLES2Interface* DrawingBuffer::contextGL()
+{
+    return m_gl;
+}
+
+
 void DrawingBuffer::setIsHidden(bool hidden)
 {
     if (m_isHidden == hidden)