Translator: Remove GLSL rules from the ESSL-only symbol table

Shaves ~36KB off of ANGLE's binary size on Android.

Bug: chromium:1084580
Change-Id: I4711c6bd28437a43b7dc63be4cfcdaed7ae11ba2
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3052686
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>

scripts/code_generation_hashes/Static_builtins.json

@@ -6,9 +6,9 @@
   "src/compiler/translator/Operator_autogen.h":
     "340c7966d65f4f46858cc228e103cd86",
   "src/compiler/translator/SymbolTable_ESSL_autogen.cpp":
-    "1deb234886356c7d5e95a4e4f41b0972",
+    "b247c30ea9977437456ad5df90177a1d",
   "src/compiler/translator/SymbolTable_autogen.cpp":
-    "e2ec1e914789ee68fff7c2773a0e513b",
+    "12e50c9441a6d6180d261cd751f4c8c5",
   "src/compiler/translator/SymbolTable_autogen.h":
     "d43593050c4d1b31b0be9cdd3a2d0ea5",
   "src/compiler/translator/builtin_function_declarations.txt":
@@ -16,7 +16,7 @@
   "src/compiler/translator/builtin_variables.json":
     "1fc6aefb15d2bae17cd20bf4fc2a7702",
   "src/compiler/translator/gen_builtin_symbols.py":
-    "abdd4a38b43a7306862a2cc6d2b8e9d9",
+    "e77c4c743c26d8515661a9d9c4d3c96b",
   "src/compiler/translator/tree_util/BuiltIn_ESSL_autogen.h":
     "8c556b91d261b6002d9569bd68323b15",
   "src/compiler/translator/tree_util/BuiltIn_complete_autogen.h":

src/compiler/translator/gen_builtin_symbols.py

@@ -855,7 +855,7 @@ class GroupedList:
     def get_offsets(self):
         return self.offsets
 
-    def update_arrays(self):
+    def update_arrays(self, essl_only):
 
         def add_rule(rules, spec, level, shaders, extension, symbol):
             var = ("&TableBase::%s" % symbol) if symbol.startswith("m_gl") else None
@@ -897,7 +897,7 @@ class GroupedList:
                     add_rule(rules, "ESSL", data['essl_level'], data['shader_type'], None,
                              data["symbol"])
 
-                if "symbol" in data and "glsl_level" in data:
+                if "symbol" in data and "glsl_level" in data and not essl_only:
                     add_rule(rules, "GLSL", data['glsl_level'], data['shader_type'], None,
                              data["symbol"])
 
@@ -905,7 +905,7 @@ class GroupedList:
                     add_rule(rules, "ESSL", data['essl_level2'], data['shader_type2'], None,
                              data["symbol2"])
 
-                if "symbol2" in data and "glsl_level2" in data:
+                if "symbol2" in data and "glsl_level2" in data and not essl_only:
                     add_rule(rules, "GLSL", data['glsl_level2'], data['shader_type2'], None,
                              data["symbol2"])
 
@@ -913,7 +913,7 @@ class GroupedList:
                     add_rule(rules, "ESSL", data['essl_level3'], data['shader_type3'], None,
                              data["symbol3"])
 
-                if "symbol3" in data and "glsl_level3" in data:
+                if "symbol3" in data and "glsl_level3" in data and not essl_only:
                     add_rule(rules, "GLSL", data['glsl_level3'], data['shader_type3'], None,
                              data["symbol3"])
 
@@ -921,7 +921,7 @@ class GroupedList:
                     add_rule(rules, "ESSL", data['essl_level4'], data['shader_type4'], None,
                              data["symbol4"])
 
-                if "symbol4" in data and "glsl_level4" in data:
+                if "symbol4" in data and "glsl_level4" in data and not essl_only:
                     add_rule(rules, "GLSL", data['glsl_level4'], data['shader_type4'], None,
                              data["symbol4"])
 
@@ -929,7 +929,7 @@ class GroupedList:
                     add_rule(rules, "ESSL", data["essl_ext_level"], data["essl_ext_shader_type"],
                              data["essl_extension"], data["essl_ext_symbol"])
 
-                if "glsl_ext_symbol" in data:
+                if "glsl_ext_symbol" in data and not essl_only:
                     add_rule(rules, "GLSL", data["glsl_ext_level"], data["glsl_ext_shader_type"],
                              data["glsl_extension"], data["glsl_ext_symbol"])
 
@@ -2119,7 +2119,7 @@ def generate_files(essl_only, args, functions_txt_filename, variables_json_filen
     for group_name, group in parsed_variables.items():
         process_variable_group('NONE', group_name, group, symbols, variables, mangled_builtins)
 
-    mangled_builtins.update_arrays()
+    mangled_builtins.update_arrays(essl_only)
 
     output_strings = {
         'script_name':

src/tests/compiler_tests/ShCompile_test.cpp

@@ -227,6 +227,9 @@ TEST_F(ShCompileTest, DecimalSepLocale)
     }
 }
 
+// Desktop GLSL support is not enabled on Android
+#if !defined(ANGLE_PLATFORM_ANDROID)
+
 // For testing Desktop GL Shaders
 class ShCompileDesktopGLTest : public ShCompileTest
 {
@@ -364,3 +367,5 @@ TEST_F(ShCompileDesktopGLTest, ImplicitConversionFunction)
 
     testCompile(shaderStrings, 1, true);
 }
+
+#endif  // !defined(ANGLE_PLATFORM_ANDROID)