Use EXPECT_EQ directly instead of EXPECT_STREQ in the tests of blink's renderer/modules

As the first step to deprecate WTF::CString, the bug has suggested replacing
EXPECT_STREQ with EXPECT_EQ. This CL replaces EXPECT_STREQ with EXPECT_EQ
in the cases of both converting WTF::String to const char* to use EXPECT_STREQ
and the expected string is ASCII.

Bug: 950077
Change-Id: I6d01f32f70910edc3e5326fa7862e56be3dd12d2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1614762
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660378}
2 files changed