[Android] Build android tools as PIE and add a wrapper for ICS

build/common.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 4222 matching lines @@
                 'cflags!': [
                   '-fstack-protector',
                 ],
                 'cflags': [
                   '-fno-stack-protector',
                 ],
               }],
             ],
             'target_conditions': [
               ['_type=="executable"', {
+                # Force android tools to export the "main" symbol so they can be
+                # loaded on ICS using the run_pie wrapper. See crbug.com/373219.
+                # TODO(primiano): remove -fvisibility and -rdynamic flags below
+                # when ICS support will be dropped.
+                'cflags': [
+                  '-fPIE',
+                  '-fvisibility=default',
+                ],
                 'ldflags': [
                   '-Bdynamic',
                   '-Wl,--gc-sections',
                   '-Wl,-z,nocopyreloc',
+                  '-pie',
+                  '-rdynamic',
                   # crtbegin_dynamic.o should be the last item in ldflags.
                   '<(android_ndk_lib)/crtbegin_dynamic.o',
                 ],
                 'libraries': [
                   # crtend_android.o needs to be the last item in libraries.
                   # Do not add any libraries after this!
                   '<(android_ndk_lib)/crtend_android.o',
                 ],
-                'conditions': [
-                  ['asan==1', {
-                    'cflags': [
-                      '-fPIE',
-                    ],
-                    'ldflags': [
-                      '-pie',
-                    ],
-                  }],
-                ],
               }],
               ['_type=="shared_library" or _type=="loadable_module"', {
                 'ldflags': [
                   '-Wl,-shared,-Bsymbolic',
                 ],
                 'conditions': [
                   ['android_webview_build==0', {
                     'ldflags': [
                       # crtbegin_so.o should be the last item in ldflags.
                       '<(android_ndk_lib)/crtbegin_so.o',
@@ skipping 1004 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }