[IPC Fuzzer]Add traits for several enum types

Add viz::ResourceFormat to handle:
GpuChannelMsg_CreateSharedImage,
GpuChannelMsg_CreateSharedImageWithData.

Add net::EffectiveConnectionType to handle:
ViewMsg_UpdateWebPreferences.

Add printing::MarginType to handle:
PrintHostMsg_ScriptedPrint.

Change-Id: I8f0af98fd34384623f9d164fa4b1ebcaa35b6f0a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2243993
Commit-Queue: Martin Barbella <mbarbella@chromium.org>
Reviewed-by: Martin Barbella <mbarbella@chromium.org>
Cr-Commit-Position: refs/heads/master@{#778032}

tools/ipc_fuzzer/fuzzer/fuzzer.cc

@@ -714,6 +714,15 @@ struct FuzzTraits<viz::FrameSinkId> {
   }
 };
 
+template <>
+struct FuzzTraits<viz::ResourceFormat> {
+  static bool Fuzz(viz::ResourceFormat* p, Fuzzer* fuzzer) {
+    int format = RandInRange(viz::ResourceFormat::RESOURCE_FORMAT_MAX + 1);
+    *p = static_cast<viz::ResourceFormat>(format);
+    return true;
+  }
+};
+
 template <class A>
 struct FuzzTraits<cc::ListContainer<A>> {
   static bool Fuzz(cc::ListContainer<A>* p, Fuzzer* fuzzer) {
@@ -1449,6 +1458,16 @@ struct FuzzTraits<media::VideoPixelFormat> {
   }
 };
 
+template <>
+struct FuzzTraits<net::EffectiveConnectionType> {
+  static bool Fuzz(net::EffectiveConnectionType* p, Fuzzer* fuzzer) {
+    int type = RandInRange(
+        net::EffectiveConnectionType::EFFECTIVE_CONNECTION_TYPE_LAST + 1);
+    *p = static_cast<net::EffectiveConnectionType>(type);
+    return true;
+  }
+};
+
 template <>
 struct FuzzTraits<net::LoadTimingInfo> {
   static bool Fuzz(net::LoadTimingInfo* p, Fuzzer* fuzzer) {
@@ -1692,6 +1711,15 @@ struct FuzzTraits<ppapi::SocketOptionData> {
   }
 };
 
+template <>
+struct FuzzTraits<printing::MarginType> {
+  static bool Fuzz(printing::MarginType* p, Fuzzer* fuzzer) {
+    int type = RandInRange(printing::MarginType::MARGIN_TYPE_LAST + 1);
+    *p = static_cast<printing::MarginType>(type);
+    return true;
+  }
+};
+
 template <>
 struct FuzzTraits<SkBitmap> {
   static bool Fuzz(SkBitmap* p, Fuzzer* fuzzer) {