We had a TTypeLine to represent a structure field,
which simply encapsulated a TType and line number.
The line number was only used during parsing for error reporting.
There is no need to store a line number because it is already
available in the parser token.

TEST=WebGL conformance tests
R=kbr@chromium.org

Review URL: https://codereview.appspot.com/9223045


Additional edits required for dx11proto branch:

    src/compiler/OutputHLSL.cpp
    src/compiler/Types.h

Conflicts:

	src/compiler/glslang_tab.cpp
	src/compiler/glslang_tab.h

git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@2235 736b8ea6-26fd-11df-bfd4-992fa37f6226