MIPS: Make concrete classes for individual call descriptors. - external

Port r23639 (e5a2758)

Original commit message:
The ic-convention classes that hold register specifications are merged into these new call descriptor classes, which should represent a final home for that information.

BUG=
R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/535753003

Patch from Balazs Kilvady <balazs.kilvady@imgtec.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23667 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUILD.gn

@@ -1080,7 +1080,6 @@ source_set("v8_base") {
       "src/ic/mips/handler-compiler-mips.cc",
       "src/ic/mips/ic-mips.cc",
       "src/ic/mips/ic-compiler-mips.cc",
-      "src/ic/mips/ic-conventions-mips.cc",
       "src/ic/mips/stub-cache-mips.cc",
     ]
   } else if (v8_target_arch == "mips64el") {
@@ -1118,7 +1117,6 @@ source_set("v8_base") {
       "src/ic/mips64/handler-compiler-mips64.cc",
       "src/ic/mips64/ic-mips64.cc",
       "src/ic/mips64/ic-compiler-mips64.cc",
-      "src/ic/mips64/ic-conventions-mips64.cc",
       "src/ic/mips64/stub-cache-mips64.cc",
     ]
   }

tools/gyp/v8.gyp

@@ -1006,7 +1006,6 @@
             '../../src/ic/mips/handler-compiler-mips.cc',
             '../../src/ic/mips/ic-mips.cc',
             '../../src/ic/mips/ic-compiler-mips.cc',
-            '../../src/ic/mips/ic-conventions-mips.cc',
             '../../src/ic/mips/stub-cache-mips.cc',
           ],
         }],
@@ -1045,7 +1044,6 @@
             '../../src/ic/mips64/handler-compiler-mips64.cc',
             '../../src/ic/mips64/ic-mips64.cc',
             '../../src/ic/mips64/ic-compiler-mips64.cc',
-            '../../src/ic/mips64/ic-conventions-mips64.cc',
             '../../src/ic/mips64/stub-cache-mips64.cc',
           ],
         }],