Support using loadable module for libpeerconnection on Android.

Support using loadable module for libpeerconnection on Android.

Borrowed create_standalone_apk_action.gypi, create_standalone_apk.py and finalize_apk_action.gypi from https://codereview.chromium.org/14843017/ with some minor fix in create_standalone_apk_action.gypi.

For some cases where libpeerconnection needs to be a loadable module, we need to add libpeerconnection.so into Chrome_apk.
This patch takes 2 steps:
1. build chrome with libpeer_target_type=loadable_module.
2. add libpeerconnection.so into the apk file.

TEST=run gyp: GYP_DEFINES="$GYP_DEFINES libpeer_target_type=loadable_module" build/gyp_chromium
     build chrome
     re-run gyp: GYP_DEFINES="$GYP_DEFINES libpeer_target_type=loadable_module" CHROMIUM_GYP_FILE="build/android/chrome_with_libs.gyp" build/gyp_chromium
     build chrome_with_libs
     install Chrome-with-libs.apk and it works for https://apprtc.appspot.com

R=cjhopman@chromium.org, mallinath@chromium.org, tommi@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=208246

[tommi (sloooow) - chröme, 2013-06-24 08:09:12]

lgtm!  excellent work Wei - I don't have enough context to review the android
specific code but the libjingle part lgtm.

https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
File build/android/chrome_with_libs.gyp (right):

https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
build/android/chrome_with_libs.gyp:9: # As an example, when building Chrome_apk
with libpeer_target_type=loadable_module,
nit: it will make future diffs easier if you can wrap at 80 columns.

https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
build/android/chrome_with_libs.gyp:54: ]
nit: ], and }, for consistency (commas after ] and })

[wjia(left Chromium), 2013-06-24 17:56:20]

Thanks!

https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
File build/android/chrome_with_libs.gyp (right):

https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
build/android/chrome_with_libs.gyp:9: # As an example, when building Chrome_apk
with libpeer_target_type=loadable_module,
On 2013/06/24 08:09:12, tommi wrote:
> nit: it will make future diffs easier if you can wrap at 80 columns.

Done.

https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
build/android/chrome_with_libs.gyp:54: ]
On 2013/06/24 08:09:12, tommi wrote:
> nit: ], and }, for consistency (commas after ] and })

Done.

[cjhopman, 2013-06-24 18:36:34]

On 2013/06/24 08:09:12, tommi wrote:
> lgtm!  excellent work Wei - I don't have enough context to review the android
> specific code but the libjingle part lgtm.
> 
>
https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
> File build/android/chrome_with_libs.gyp (right):
> 
>
https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
> build/android/chrome_with_libs.gyp:9: # As an example, when building
Chrome_apk
> with libpeer_target_type=loadable_module,
> nit: it will make future diffs easier if you can wrap at 80 columns.
> 
>
https://codereview.chromium.org/17569006/diff/1/build/android/chrome_with_lib...
> build/android/chrome_with_libs.gyp:54: ]
> nit: ], and }, for consistency (commas after ] and })

build/android lgtm

[Mallinath (Gone from Chromium), 2013-06-24 18:50:22]

lgtm for libjingle changes

[wjia(left Chromium), 2013-06-24 18:54:13]

Committed patchset #2 manually as r208246 (presubmit successful).