PPAPI: Make ASSERT macros print values of operands

With this patch, if one of our ASSERT macros fails, the error
string will contain the expected and actual values.

I made a browser test for it. I would prefer a
unit test, but I didn't want to have to mix test_case.h with
our unit tests.

BUG=None

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=246129

Review URL: https://codereview.chromium.org/123463007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@246757 0039d316-1c4b-4281-b951-d872f2087c98

chrome/test/ppapi/ppapi_browsertest.cc

@@ -1692,6 +1692,8 @@ IN_PROC_BROWSER_TEST_F(OutOfProcessPPAPITest, FlashDRM) {
 TEST_PPAPI_IN_PROCESS(TalkPrivate)
 TEST_PPAPI_OUT_OF_PROCESS(TalkPrivate)
 
+TEST_PPAPI_OUT_OF_PROCESS(TestInternals)
+
 #if defined(OS_CHROMEOS)
 TEST_PPAPI_OUT_OF_PROCESS(OutputProtectionPrivate)
 #endif

ppapi/ppapi_sources.gypi

@@ -484,6 +484,8 @@
       'tests/test_tcp_socket.h',
       'tests/test_tcp_socket_private.cc',
       'tests/test_tcp_socket_private.h',
+      'tests/test_test_internals.cc',
+      'tests/test_test_internals.h',
       'tests/test_trace_event.cc',
       'tests/test_trace_event.h',
       'tests/test_truetype_font.cc',