Split TIntermDeclaration from TIntermAggregate

The new class TIntermDeclaration is now used for struct, interface
block and variable declarations. TIntermDeclaration nodes do not have
a type - rather the type is stored in each child node. The types may
differ in case the declaration is a series of array declarators with
mismatching sizes.

TIntermAggregate is still used for function calls, function
prototypes, function parameter lists and invariant declarations.

BUG=angleproject:1490
TEST=angle_unittests

Change-Id: I0457188f354481470855f61ac1c878fc2579b1d1
Reviewed-on: https://chromium-review.googlesource.com/400023
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/compiler/translator/OutputGLSLBase.h b/src/compiler/translator/OutputGLSLBase.h
index aa861c7..01dc2e8 100644
--- a/src/compiler/translator/OutputGLSLBase.h
+++ b/src/compiler/translator/OutputGLSLBase.h
@@ -52,6 +52,7 @@
     bool visitFunctionDefinition(Visit visit, TIntermFunctionDefinition *node) override;
     bool visitAggregate(Visit visit, TIntermAggregate *node) override;
     bool visitBlock(Visit visit, TIntermBlock *node) override;
+    bool visitDeclaration(Visit visit, TIntermDeclaration *node) override;
     bool visitLoop(Visit visit, TIntermLoop *node) override;
     bool visitBranch(Visit visit, TIntermBranch *node) override;