Always send DidOverscroll callback for android_webview.

Some WebView embedders depend on overscroll notifications coming in
even if the contents isn't otherwise scrollable. The WebView will
not draw the overscroll glow in these cases but the embedder might
chose to perform some action (like going to a different page) in
such a case.

NOTRY=true
BUG=internal b/8207890

Review URL: https://codereview.chromium.org/24600002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225541 0039d316-1c4b-4281-b951-d872f2087c98
Add comment in NativeMessageProcessHost::HandleReadResult()

Just a minor fix wtc@ suggested in https://codereview.chromium.org/24409004/.

R=mpcomplete@chromium.org

Review URL: https://codereview.chromium.org/24806002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225542 0039d316-1c4b-4281-b951-d872f2087c98
Follow-on to bug 297718: Fix escaping in context menu (right-cick) Copy Image.

The test is on the webkit side at https://codereview.chromium.org/24530004/

BUG=297718
R=dcheng@chromium.org, tony@chromium.org

Review URL: https://codereview.chromium.org/24662002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225543 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225543