Revert of Move copy-surface-as-draw fallback to GrGLGpu.

src/gpu/gl/GrGLCaps.cpp

Index: src/gpu/gl/GrGLCaps.cpp
diff --git a/src/gpu/gl/GrGLCaps.cpp b/src/gpu/gl/GrGLCaps.cpp
index 5ee75460cf1664476d1c1e0a78260839c95692df..06ebe3d34d0890468870cd1245f643a9220df16c 100644
--- a/src/gpu/gl/GrGLCaps.cpp
+++ b/src/gpu/gl/GrGLCaps.cpp
@@ -942,7 +942,6 @@
 
 GrGLSLCaps& GrGLSLCaps::operator= (const GrGLSLCaps& caps) {
     INHERITED::operator=(caps);
-    fGLSLGeneration = caps.fGLSLGeneration;
     fDropsTileOnZeroDivide = caps.fDropsTileOnZeroDivide;
     fFBFetchSupport = caps.fFBFetchSupport;
     fFBFetchNeedsCustomOutput = caps.fFBFetchNeedsCustomOutput;
@@ -961,8 +960,6 @@
         return false;
     }
 
-    fGLSLGeneration = ctxInfo.glslGeneration();
-    
     GrGLStandard standard = ctxInfo.standard();
     GrGLVersion version = ctxInfo.version();