Fix opening images from the download shelf.

Opening an image from the download shelf, opens Files app with an action == gallery. This is different than just a 'gallery' field in the appState, which is used for recovering. This patch adds the condition for the gallery action to resolve this problem.

TEST=Tested manually.
BUG=335458

Review URL: https://codereview.chromium.org/132463003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245876 0039d316-1c4b-4281-b951-d872f2087c98
[Pepper][FileAPI] Support append mode write on QuotaReservation backend

BUG=334171
TEST=content_unittests --gtest_filter='QuotaReservationManagerTest.*'

Review URL: https://codereview.chromium.org/132993003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245877 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245876
Resolve override/overload conflict in WebPluginImpl.

WebPluginImpl implements WebPlugin and WebURLLoaderClient interfaces.
Both interfaces have "didFinishLoading" method.

Because of this it is impossible to upgrade signature of the method.
(Clang reports error).

BUG=

Review URL: https://codereview.chromium.org/136793024

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245878 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245878
Remove an upstreamed entry from test_expectations_w3c.txt.

The entry was already in LayoutTests/TestExpectations.
See  https://codereview.chromium.org/137993003.

TBR=dpranke
BUG=334152

Review URL: https://codereview.chromium.org/138913003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245879 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245879