[turbofan] Remove architecture-specific linkage files and LinkageTraits. Use macro-assembler-define…

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index f4d1b2de842b5f3e8d64c942159ed9a1ea0fb9b5..b935b2d53d6b88a933ab99ccf62dd479a664c3ab 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -741,7 +741,6 @@ source_set("v8_base") {
     "src/compiler/js-typed-lowering.h",
     "src/compiler/jump-threading.cc",
     "src/compiler/jump-threading.h",
-    "src/compiler/linkage-impl.h",
     "src/compiler/linkage.cc",
     "src/compiler/linkage.h",
     "src/compiler/liveness-analyzer.cc",
@@ -1227,7 +1226,6 @@ source_set("v8_base") {
       "src/compiler/ia32/code-generator-ia32.cc",
       "src/compiler/ia32/instruction-codes-ia32.h",
       "src/compiler/ia32/instruction-selector-ia32.cc",
-      "src/compiler/ia32/linkage-ia32.cc",
       "src/debug/ia32/debug-ia32.cc",
       "src/full-codegen/ia32/full-codegen-ia32.cc",
       "src/ic/ia32/access-compiler-ia32.cc",
@@ -1265,7 +1263,6 @@ source_set("v8_base") {
       "src/compiler/x64/code-generator-x64.cc",
       "src/compiler/x64/instruction-codes-x64.h",
       "src/compiler/x64/instruction-selector-x64.cc",
-      "src/compiler/x64/linkage-x64.cc",
       "src/debug/x64/debug-x64.cc",
       "src/full-codegen/x64/full-codegen-x64.cc",
       "src/ic/x64/access-compiler-x64.cc",
@@ -1308,7 +1305,6 @@ source_set("v8_base") {
       "src/compiler/arm/code-generator-arm.cc",
       "src/compiler/arm/instruction-codes-arm.h",
       "src/compiler/arm/instruction-selector-arm.cc",
-      "src/compiler/arm/linkage-arm.cc",
       "src/debug/arm/debug-arm.cc",
       "src/full-codegen/arm/full-codegen-arm.cc",
       "src/ic/arm/access-compiler-arm.cc",
@@ -1361,7 +1357,6 @@ source_set("v8_base") {
       "src/compiler/arm64/code-generator-arm64.cc",
       "src/compiler/arm64/instruction-codes-arm64.h",
       "src/compiler/arm64/instruction-selector-arm64.cc",
-      "src/compiler/arm64/linkage-arm64.cc",
       "src/debug/arm64/debug-arm64.cc",
       "src/full-codegen/arm64/full-codegen-arm64.cc",
       "src/ic/arm64/access-compiler-arm64.cc",
@@ -1403,7 +1398,6 @@ source_set("v8_base") {
       "src/compiler/mips/code-generator-mips.cc",
       "src/compiler/mips/instruction-codes-mips.h",
       "src/compiler/mips/instruction-selector-mips.cc",
-      "src/compiler/mips/linkage-mips.cc",
       "src/debug/mips/debug-mips.cc",
       "src/full-codegen/mips/full-codegen-mips.cc",
       "src/ic/mips/access-compiler-mips.cc",