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

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 4000efe768d7df16aef16cb3402652c9fd1f45d8..e1be6a11068dd443142a009c2de28641c9cd09f2 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -4240,10 +4240,20 @@
             ],
             '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',
                 ],
@@ -4252,16 +4262,6 @@
                   # 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': [