Addition of GL_CHROMIUM_copy_texture extension.

gpu/command_buffer/service/texture_manager.h

Index: gpu/command_buffer/service/texture_manager.h
===================================================================
--- gpu/command_buffer/service/texture_manager.h	(revision 132133)
+++ gpu/command_buffer/service/texture_manager.h	(working copy)
@@ -141,6 +141,10 @@
     bool GetLevelSize(
         GLint face, GLint level, GLsizei* width, GLsizei* height) const;
 
+    // Set the width and height for a particular level. Returns false if level
+    // does not exist.
+    bool SetLevelSize(GLint face, GLint level, GLsizei width, GLsizei height);
+
     // Get the type of a level. Returns false if level does not exist.
     bool GetLevelType(
         GLint face, GLint level, GLenum* type, GLenum* internal_format) const;