Addition of unpremultiply setting to GL_CHROMIUM_copy_texture.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
===================================================================
--- gpu/command_buffer/service/gles2_cmd_decoder.cc	(revision 141671)
+++ gpu/command_buffer/service/gles2_cmd_decoder.cc	(working copy)
@@ -1388,8 +1388,9 @@
   // unpack flip y as last set by glPixelStorei
   bool unpack_flip_y_;
 
-  // unpack premultiply alpha as last set by glPixelStorei
+  // unpack (un)premultiply alpha as last set by glPixelStorei
   bool unpack_premultiply_alpha_;
+  bool unpack_unpremultiply_alpha_;
 
   // The currently bound array buffer. If this is 0 it is illegal to call
   // glVertexAttribPointer.
@@ -1904,6 +1905,7 @@
       unpack_alignment_(4),
       unpack_flip_y_(false),
       unpack_premultiply_alpha_(false),
+      unpack_unpremultiply_alpha_(false),
       attrib_0_buffer_id_(0),
       attrib_0_buffer_matches_value_(true),
       attrib_0_size_(0),
@@ -3834,6 +3836,24 @@
         }
       }
       return true;
+    case GL_UNPACK_FLIP_Y_CHROMIUM:
+      *num_written = 1;
+      if (params) {
+        params[0] = unpack_flip_y_;
+      }
+      return true;
+    case GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM:
+      *num_written = 1;
+      if (params) {
+        params[0] = unpack_premultiply_alpha_;
+      }
+      return true;
+    case GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM:
+      *num_written = 1;
+      if (params) {
+        params[0] = unpack_unpremultiply_alpha_;
+      }
+      return true;
     default:
       *num_written = util_.GLGetNumValuesReturned(pname);
       return false;
@@ -6365,6 +6385,9 @@
     case GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM:
         unpack_premultiply_alpha_ = (param != 0);
         return error::kNoError;
+    case GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM:
+        unpack_unpremultiply_alpha_ = (param != 0);
+        return error::kNoError;
     default:
         break;
   }
@@ -8825,7 +8848,8 @@
   copy_texture_CHROMIUM_->DoCopyTexture(target, source_info->service_id(),
                                         dest_info->service_id(), level,
                                         unpack_flip_y_,
-                                        unpack_premultiply_alpha_);
+                                        unpack_premultiply_alpha_,
+                                        unpack_unpremultiply_alpha_);
   glViewport(viewport_x_, viewport_y_, viewport_width_, viewport_height_);
 
   // Restore all of the state touched by the extension.