Re-enable image_decode_bench target

third_party/WebKit/Source/platform/BUILD.gn

Index: third_party/WebKit/Source/platform/BUILD.gn
diff --git a/third_party/WebKit/Source/platform/BUILD.gn b/third_party/WebKit/Source/platform/BUILD.gn
index 2d670ca1550e732a470a700534a56fb20ab3faac..040a977b970978d7c8af8f7146fde3324b83e10b 100644
--- a/third_party/WebKit/Source/platform/BUILD.gn
+++ b/third_party/WebKit/Source/platform/BUILD.gn
@@ -1835,6 +1835,28 @@ test("blink_platform_unittests") {
   include_dirs = [ "$root_gen_dir/blink" ]
 }
 
+test("image_decode_bench") {
+  visibility = []  # Allow re-assignment of list.
+  visibility = [ "*" ]

[Simon Hosie, 2016/11/16 18:29:22]

I'm not certain about this line.  I don't know what visibility does but did
wonder if it might imply adding itself as a target for builds that don't want it
and might fail with it.

I'm also not sure about the rest of this file.  I just copied all the lines that
looked appropriate from the unit test above based on what I could see in the old
.gyp file.  It does build and run on Linux and Chromium, though.

GYP file for reference:
https://chromium.googlesource.com/chromium/src/+/980562f70d53ff313d4f5cd885c7...

+
+  sources = [
+    "testing/ImageDecodeBench.cpp",
+  ]
+
+  deps = [
+    ":blink_common",
+    ":platform",
+    "//third_party/WebKit/Source/wtf",
+  ]
+
+  configs += [
+    "//third_party/WebKit/Source/wtf:wtf_config",
+    "//third_party/WebKit/Source:config",
+  ]
+
+  defines = [ "INSIDE_BLINK" ]
+}
+
 test("blink_platform_perftests") {
   sources = [
     "scheduler/base/task_queue_manager_delegate_for_test.cc",