Relocate resource_fetcher_browsertest.cc into fetchers/ directory

Since the test target is in fetchers/ directory, move the test
file to the same directory.

Some EXPECT_EQ arguments are swapped because the first argument
should be the expectation so that failed error messages are readable.
'git cl format' is also applied to make the presubmit check happy.

In addition to mechanical changes, this patch also adds one additional
test case that an existing caller actually relies on. This will help
to avoid regression in the following refactoring.

This patch is the first step to remove blink::WebURLLoader calls
from content::ResourceFetcher. Following changes will actually
replace it with mojom::URLLoader, and modify the content interface
to be simple enough.

Bug: 752028
Change-Id: Ic59857c5bb5a84476547016d066db8e46e9474bb
Reviewed-on: https://chromium-review.googlesource.com/628396
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#497322}
2 files changed