Fuchsia: Initial check-in.

runtime/vm/vm_sources.gypi

Index: runtime/vm/vm_sources.gypi
diff --git a/runtime/vm/vm_sources.gypi b/runtime/vm/vm_sources.gypi
index cdaa40691387909fc0de5cc3476049cc47c470fc..0b77a54b2294be89b65c809194ea17a86826f0a1 100644
--- a/runtime/vm/vm_sources.gypi
+++ b/runtime/vm/vm_sources.gypi
@@ -43,6 +43,7 @@
     'ast_transformer.h',
     'atomic.h',
     'atomic_android.h',
+    'atomic_fuchsia.h',
     'atomic_linux.h',
     'atomic_macos.h',
     'atomic_simulator.h',
@@ -127,6 +128,7 @@
     'cpuid.cc',
     'cpuinfo.h',
     'cpuinfo_android.cc',
+    'cpuinfo_fuchsia.cc',
     'cpuinfo_linux.cc',
     'cpuinfo_macos.cc',
     'cpuinfo_test.cc',
@@ -307,6 +309,7 @@
     'native_message_handler.h',
     'native_symbol.h',
     'native_symbol_android.cc',
+    'native_symbol_fuchsia.cc',
     'native_symbol_linux.cc',
     'native_symbol_macos.cc',
     'native_symbol_win.cc',
@@ -333,6 +336,7 @@
     'object_x64_test.cc',
     'os.h',
     'os_android.cc',
+    'os_fuchsia.cc',
     'os_linux.cc',
     'os_macos.cc',
     'os_test.cc',
@@ -340,6 +344,8 @@
     'os_thread.h',
     'os_thread_android.cc',
     'os_thread_android.h',
+    'os_thread_fuchsia.cc',
+    'os_thread_fuchsia.h',
     'os_thread_linux.cc',
     'os_thread_linux.h',
     'os_thread_macos.cc',
@@ -426,6 +432,7 @@
     'service_isolate.h',
     'service_test.cc',
     'signal_handler_android.cc',
+    'signal_handler_fuchsia.cc',
     'signal_handler_linux.cc',
     'signal_handler_macos.cc',
     'signal_handler_win.cc',
@@ -481,6 +488,7 @@
     'thread_interrupter.cc',
     'thread_interrupter.h',
     'thread_interrupter_android.cc',
+    'thread_interrupter_fuchsia.cc',
     'thread_interrupter_linux.cc',
     'thread_interrupter_macos.cc',
     'thread_interrupter_win.cc',
@@ -520,6 +528,7 @@
     'virtual_memory.cc',
     'virtual_memory.h',
     'virtual_memory_android.cc',
+    'virtual_memory_fuchsia.cc',
     'virtual_memory_linux.cc',
     'virtual_memory_macos.cc',
     'virtual_memory_test.cc',