Rename a gpu workaround.

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 6b4d710dd44e0d5df966c60d579fe7e073756288..ff9836653415704ea32f85afac09c1bc6354f461 100644
--- a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.cpp
@@ -799,7 +799,7 @@ void DrawingBuffer::commit()
         // multisampled renderbuffers and the alpha channel can be overwritten.
         // Clear the alpha channel of |m_fbo|.
         if (defaultBufferRequiresAlphaChannelToBePreserved()
-            && contextProvider()->getCapabilities().disable_webgl_multisampling_color_mask_usage) {
+            && contextProvider()->getCapabilities().disable_multisampling_color_mask_usage) {
             m_gl->ClearColor(0, 0, 0, 1);
             m_gl->ColorMask(false, false, false, true);
             m_gl->Clear(GL_COLOR_BUFFER_BIT);