cc: Make one-copy tile initialization mechanism use immutable textures.

ui/gl/gl_image_memory.cc

Index: ui/gl/gl_image_memory.cc
diff --git a/ui/gl/gl_image_memory.cc b/ui/gl/gl_image_memory.cc
index a752940615fd9a6b7cb10bc6f2772468fbd63050..e325127254e42a22caab35e10568bc771b0da20a 100644
--- a/ui/gl/gl_image_memory.cc
+++ b/ui/gl/gl_image_memory.cc
@@ -179,15 +179,9 @@ bool GLImageMemory::CopyTexImage(unsigned target) {
     return false;
 
   DCHECK(memory_);
-  glTexImage2D(target,
-               0,  // mip level
-               TextureFormat(format_),
-               size_.width(),
-               size_.height(),
-               0,  // border
-               DataFormat(format_),
-               DataType(format_),
-               memory_);
+  glTexSubImage2D(target, 0 /* level */, 0 /* x */, 0 /* y */, size_.width(),
+                  size_.height(), DataFormat(format_), DataType(format_),
+                  memory_);

[reveman, 2014/11/20 18:57:15]

nit: Please make the style consistent with TexSubImage2D call in
::DoBindTexImage for now ("//" style comments and one argument per line) I'll cl
format this whole file in a follow up.

 
   return true;
 }