third_party/brotli: Split out the encoder target in BUILD.gn.

Bug: 907489
Change-Id: Ia66d652b30fbaba67035e042a2144adc3727c582
Reviewed-on: https://chromium-review.googlesource.com/c/1347282
Commit-Queue: Benoit L <lizeb@chromium.org>
Reviewed-by: Kenichi Ishibashi <bashi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611121}

third_party/brotli/BUILD.gn

@@ -60,45 +60,7 @@ dec_sources = [
   "dec/state.h",
 ]
 
-static_library("dec") {
-  sources = dec_sources
-  public_configs = [ ":includes" ]
-  public_deps = [
-    ":headers",
-  ]
-  deps = [
-    ":common",
-  ]
-
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
-
-  # Since we never debug brotli, freeze the optimizations to -O2.
-  configs -= [ "//build/config/compiler:default_optimization" ]
-  configs += [ "//build/config/compiler:optimize_max" ]
-}
-
-static_library("dec_no_dictionary_data") {
-  sources = dec_sources
-  public_configs = [ ":includes" ]
-  public_deps = [
-    ":headers",
-  ]
-  deps = [
-    ":common_no_dictionary_data",
-  ]
-
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
-
-  # Since we never debug brotli, freeze the optimizations to -O2.
-  configs -= [ "//build/config/compiler:default_optimization" ]
-  configs += [ "//build/config/compiler:optimize_max" ]
-}
-
-if (current_toolchain == host_toolchain) {
-  executable("brotli") {
-    sources = [
+enc_sources = [
   "enc/backward_references.c",
   "enc/backward_references.h",
   "enc/backward_references_hq.c",
@@ -159,6 +121,66 @@ if (current_toolchain == host_toolchain) {
   "enc/utf8_util.c",
   "enc/utf8_util.h",
   "enc/write_bits.h",
+]
+
+static_library("dec") {
+  sources = dec_sources
+  public_configs = [ ":includes" ]
+  public_deps = [
+    ":headers",
+  ]
+  deps = [
+    ":common",
+  ]
+
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
+  # Since we never debug brotli, freeze the optimizations to -O2.
+  configs -= [ "//build/config/compiler:default_optimization" ]
+  configs += [ "//build/config/compiler:optimize_max" ]
+}
+
+static_library("dec_no_dictionary_data") {
+  sources = dec_sources
+  public_configs = [ ":includes" ]
+  public_deps = [
+    ":headers",
+  ]
+  deps = [
+    ":common_no_dictionary_data",
+  ]
+
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
+  # Since we never debug brotli, freeze the optimizations to -O2.
+  configs -= [ "//build/config/compiler:default_optimization" ]
+  configs += [ "//build/config/compiler:optimize_max" ]
+}
+
+static_library("enc") {
+  sources = enc_sources
+  public_configs = [ ":includes" ]
+
+  public_deps = [
+    ":headers",
+  ]
+  deps = [
+    ":common",
+  ]
+
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
+  # Since we never debug brotli, freeze the optimizations to -O2.
+  configs -= [ "//build/config/compiler:default_optimization" ]
+  configs += [ "//build/config/compiler:optimize_max" ]
+}
+
+if (current_toolchain == host_toolchain) {
+  executable("brotli") {
+    sources = [
       "tools/brotli.c",
     ]
     public_configs = [ ":includes" ]
@@ -166,6 +188,7 @@ if (current_toolchain == host_toolchain) {
     deps = [
       ":common",
       ":dec",
+      ":enc",
       ":headers",
       "//build/win:default_exe_manifest",
     ]