Chromium Android tools for test execution.

The md5sum and forwarder2 binaries from Chromium's
src/tools/android are needed to be able to run tests using the
test framework launched by build/android/run_tests.py.
Since they depend on Chromium's base, we're using a precompiled
copy for WebRTC's purposes.

Linux works out of the box if Chromium's Android build instructions
at https://code.google.com/p/chromium/wiki/AndroidBuildInstructions
are used. Mac runs into problems earlier in the build toolchain,
but as Mac is not a supported Android development platform in Chrome,
the files will have to be copied manually on that platform for now.

TEST=Synced, built and ran a test APK using run_tests.py.
BUG=1882
R=andrew@webrtc.org, henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1679005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4241 4adac7df-926f-26a2-2b94-8c16560cd09d

.gitignore

@@ -66,6 +66,7 @@
 /third_party/winsdk_samples/src
 /third_party/yasm
 /third_party/WebKit/Tools/Scripts
+/tools/android
 /tools/clang
 /tools/grit
 /tools/gritsettings

DEPS

@@ -113,6 +113,11 @@ deps_os = {
       From("chromium_deps", "src/third_party/gold"),
   },
   "android": {
+    # Precompiled tools needed for Android test execution. Needed since we can't
+    # compile them from source in WebRTC since they depend on Chromium's base.
+    "tools/android":
+      (Var("googlecode_url") % "webrtc") + "/deps/tools/android@4235",
+
     "third_party/android_tools":
       From("chromium_deps", "src/third_party/android_tools"),
 

webrtc.gyp

@@ -36,6 +36,11 @@
             'tools/e2e_quality/e2e_quality.gyp:*',
           ],
         }],
+        ['OS=="android"', {
+          'dependencies': [
+            'tools/android/android_tools_precompiled.gyp:*',
+          ],
+        }],
       ],
     },
   ],