Resize the render widget host even if the widget is hidden.

Size the render widget host view when the browser tries to set it to a particular size.

BUG=21942
TEST=On Linux chrome, load a #anchor page in the background.  After
  the page loads, view the tab.  It should be scrolled to the right
  place.

[Evan Stade, 2009-09-17 02:35:34]

looks ok to me

[cpu_(ooo_6.6-7.5), 2009-09-17 18:46:43]

http://codereview.chromium.org/214002/diff/1/2
File chrome/browser/renderer_host/render_widget_host.cc (right):

http://codereview.chromium.org/214002/diff/1/2#newcode645
Line 645: 
I am afraid of side effects, this will send a Viewmsg_Resize and can that
trigger another paint cycle?

[tony, 2009-09-17 20:48:53]

Here's a better fix that just makes the GTK code more like the views code.  This
is what I should have done instead of the old code in
TabContentsViewGtk::SizeContents.

That is, when TabContentsViewGtk::SizeContents is called, it should plumb the
size down to the RWHV which in turn should make an IPC call.

[tony, 2009-09-17 23:05:24]

On 2009/09/17 20:48:53, tony wrote:
> Here's a better fix that just makes the GTK code more like the views code. 
This
> is what I should have done instead of the old code in
> TabContentsViewGtk::SizeContents.
> 
> That is, when TabContentsViewGtk::SizeContents is called, it should plumb the
> size down to the RWHV which in turn should make an IPC call.

estade: can you re-review?

[Evan Stade, 2009-09-17 23:28:37]

I am kind of confused how this interacts with 201130. RWHVGtk changes are the
same, right? so lg to that.

It seems the only effective tab contents change is that it pipes the new size
down to the render view. (the rest being stylistic). So that lg also.

[tony, 2009-09-17 23:31:00]

On 2009/09/17 23:28:37, Evan Stade wrote:
> I am kind of confused how this interacts with 201130. RWHVGtk changes are the
> same, right? so lg to that.
> 
> It seems the only effective tab contents change is that it pipes the new size
> down to the render view. (the rest being stylistic). So that lg also.

Right, I cherry picked this from 201130.  I'm going to sync it up after I land
this.  This is safe to land and is more of a style clean up.

[cpu_(ooo_6.6-7.5), 2009-09-18 17:26:26]

I am not familiar with this but have my LG pending Stade's comments.

On 2009/09/17 23:31:00, tony wrote:
> On 2009/09/17 23:28:37, Evan Stade wrote:
> > I am kind of confused how this interacts with 201130. RWHVGtk changes are
the
> > same, right? so lg to that.
> > 
> > It seems the only effective tab contents change is that it pipes the new
size
> > down to the render view. (the rest being stylistic). So that lg also.
> 
> Right, I cherry picked this from 201130.  I'm going to sync it up after I land
> this.  This is safe to land and is more of a style clean up.

[Evan Stade, 2009-09-18 18:13:47]

(lgtm if it wasn't clear)