Remove arraySize in TInterfaceBlock This patch intends to remove the field 'arraySize' in TInterfaceBlock. The field 'arraySize' in TInterfaceBlock is redundant because: 1. If the interface block has instance name, it is recorded as one symbol as a whole, and its array size is recorded in the TType of the symbol. 2. If the interface block doesn't have instance name, its members are recorded separately, and it cannot be declared as an interface block array. This patch can make the implementation of Geometry Shader easier when we set array size to the built-in interface block 'gl_in' and other user-defined unsized input interface blocks during the compilation of a Geometry Shader. BUG=angleproject:1941 TEST=angle_end2end_test Change-Id: I9a51aab9b8f9ea7e88af157505c092426cee7e6e Reviewed-on: https://chromium-review.googlesource.com/615759 Commit-Queue: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Corentin Wallez <cwallez@chromium.org>