Make reload accelerators more consistent across platforms.

Make reload accelerators more consistent across platforms.

On Windows and Linux (both Views and GTK+), this makes 
Ctrl-R, F5, and regular clicks on the reload button do
regular reloads, while Ctrl-Shift-R, Shift-F5, Control-F5,
and holding Shift or Control while clicking the button all
bypass the cache.  

It does the same for the reload button on Mac, but I'm not
modifying any Mac keyboard shortcuts in this change (it
looks like Command-Shift-R already bypasses the cache).  
I've updated http://crbug.com/38356 to mention that when
the F5 shortcut is added to Mac, the cache-bypassing
modifiers should also be supported.

BUG=47383
TEST=none

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=55175

[Daniel Erat, 2010-06-24 23:09:57]

I've been unable to find where the Command-R accelerator is being defined for
Mac -- I saw browser/cocoa/accelerators_cocoa.mm, but IDC_RELOAD isn't defined
there.

[Peter Kasting, 2010-06-24 23:12:56]

LGTM, but the description isn't really accurate until you handle the Mac
accelerator issue.  I think Mac accelerators come from their menus, which means
you may need to goof with .xibs.  You should get in touch with a Mac person to
ask about how to make this consistent (jrg would be a good choice).

[Peter Kasting, 2010-07-27 19:39:46]

Daniel, this seems like it never landed.  I think it can land as-is and then
there remains a bit of followup work on Mac, right?

[Daniel Erat, 2010-07-27 19:50:23]

On 2010/07/27 19:39:46, Peter Kasting wrote:
> Daniel, this seems like it never landed.  I think it can land as-is and then
> there remains a bit of followup work on Mac, right?

Sorry, I should've updated this.  It looks like someone fixed part of this in a
separate change, making this change seem less useful post-merge (it now just
adds support for Ctrl-F5 on GTK, and for Ctrl-clicking the Reload button on Mac
and GTK).  jrg asked me to try it out on a Mac, which I don't have any idea how
to do and haven't had time to figure out, but if you'd like to do so and then
check it in, please feel free.