Adding "static_assert" in lieu of "COMPILE_ASSERT" in google_apis module

All our toolchains support c++'s static_assert now- COMPILE_ASSERT can be removed now.

BUG=442514

Review URL: https://codereview.chromium.org/860983003

Cr-Commit-Position: refs/heads/master@{#312436}

google_apis/gcm/base/mcs_util.cc

@@ -36,8 +36,8 @@ const char* kProtoNames[] = {
   "mcs_proto.BindAccountResponse",
   "mcs_proto.TalkMetadata"
 };
-COMPILE_ASSERT(arraysize(kProtoNames) == kNumProtoTypes,
-               ProtoNamesMustIncludeAllTags);
+static_assert(arraysize(kProtoNames) == kNumProtoTypes,
+              "Proto Names Must Include All Tags");
 
 const char kLoginId[] = "chrome-";
 const char kLoginDomain[] = "mcs.android.com";

google_apis/gcm/base/mcs_util_unittest.cc

@@ -42,7 +42,7 @@ TEST(MCSUtilTest, ProtobufToTag) {
 
 // Test getting and setting persistent ids.
 TEST(MCSUtilTest, PersistentIds) {
-  COMPILE_ASSERT(kNumProtoTypes == 16U, UpdatePersistentIds);
+  static_assert(kNumProtoTypes == 16U, "Update Persistent Ids");
   const int kTagsWithPersistentIds[] = {
     kIqStanzaTag,
     kDataMessageStanzaTag
@@ -61,7 +61,7 @@ TEST(MCSUtilTest, PersistentIds) {
 
 // Test getting and setting stream ids.
 TEST(MCSUtilTest, StreamIds) {
-  COMPILE_ASSERT(kNumProtoTypes == 16U, UpdateStreamIds);
+  static_assert(kNumProtoTypes == 16U, "Update Stream Ids");
   const int kTagsWithStreamIds[] = {
     kIqStanzaTag,
     kDataMessageStanzaTag,