Prepare for |is_posix| switch in the Fuchsia build in blink

|is_posix| will be switched to false for Fuchsia, this is a preliminary change.

Bug: 812974
Change-Id: I13429e796618d3773df720259d672ae26d2390b8
Reviewed-on: https://chromium-review.googlesource.com/988810Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548162}

third_party/WebKit/Source/modules/webdatabase/BUILD.gn

@@ -84,7 +84,7 @@ blink_modules_sources("webdatabase") {
 
   if (is_win) {
     sources += [ "sqlite/SQLiteFileSystemWin.cpp" ]
-  } else if (is_posix) {
+  } else if (is_posix || is_fuchsia) {
     sources += [ "sqlite/SQLiteFileSystemPosix.cpp" ]
   }
 

third_party/WebKit/Source/platform/BUILD.gn

@@ -1936,7 +1936,7 @@ jumbo_source_set("blink_platform_unittests_sources") {
     sources += [ "text/LocaleWinTest.cpp" ]
   } else if (is_mac) {
     sources += [ "text/LocaleMacTest.cpp" ]
-  } else if (is_posix) {
+  } else if (is_posix || is_fuchsia) {
     sources += [ "text/LocaleICUTest.cpp" ]
   }