gpu: Add support for GL_TEXTURE_RECTANGLE_ARB target to CHROMIUM_copy_texture.

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h

Index: gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
diff --git a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
index 632662ef049104b4c94867c8e7e4e1de4d05a4a9..17290f8ed22f35fb2f8c69119a4e41af96a67a75 100644
--- a/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
+++ b/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h
@@ -50,10 +50,15 @@ class GPU_EXPORT CopyTextureCHROMIUMResourceManager {
 
  private:
   struct ProgramInfo {
-    ProgramInfo() : program(0u), matrix_handle(0u), sampler_handle(0u) {}
+    ProgramInfo()
+        : program(0u),
+          matrix_handle(0u),
+          half_size_handle(0u),
+          sampler_handle(0u) {}
 
     GLuint program;
     GLuint matrix_handle;
+    GLuint half_size_handle;
     GLuint sampler_handle;
   };