Remove more flags not needed by android framework.

gyp/common_conditions.gypi

 # conditions used in both common.gypi and skia.gyp in chromium
 #
 {
   'defines': [
     'SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=<(skia_static_initializers)',
     'SK_SUPPORT_GPU=<(skia_gpu)',
     'SK_SUPPORT_OPENCL=<(skia_opencl)',
     'SK_FORCE_DISTANCEFIELD_FONTS=<(skia_force_distancefield_fonts)',
   ],
   'conditions' : [
@@ skipping 200 matching lines @@
       'cflags': [
         # Skia does not enforce this usage pattern so we disable it here to avoid
         # unecessary log spew when building
         '-Wno-unused-parameter',
 
         # Android's -D_FORTIFY_SOURCE=2 extensions are incompatibile with SkString.
         # Revert to -D_FORTIFY_SOURCE=1
         '-U_FORTIFY_SOURCE',
         '-D_FORTIFY_SOURCE=1',
       ],
+      # Remove flags which are either unnecessary or problematic for the
+      # Android framework build. Many of these flags are removed simply because
+      # they were not previously in the Android framework makefile, and we did
+      # did not intend to add them when generating the makefile.
+      # TODO (scroggo): Investigate whether any of these flags are actually
+      # needed/would be beneficial.
       'cflags!': [
+        # Android has one makefile, used for both debugging (after manual
+        # modification) and release. Turn off debug info by default.
         '-g',
         '-march=armv7-a',
         '-mthumb',
         '-mfpu=neon',
         '-mfloat-abi=softfp',
+        # This flag is not supported by Android build system.
+        '-Wno-c++11-extensions',
+        '-fno-exceptions',
+        '-fstrict-aliasing',
+        # Remove flags to turn on warnings, since most people building Android
+        # are not focused on Skia and do not need the extra warning info.
+        '-Wall',
+        '-Wextra',
+        '-Winit-self',
+        '-Wpointer-arith',
+      ],
+      'cflags_cc!': [
+        '-fno-rtti',
+        '-Wnon-virtual-dtor',
       ],
       'defines': [
         'DCT_IFAST_SUPPORTED',
         # using freetype's embolden allows us to adjust fake bold settings at
         # draw-time, at which point we know which SkTypeface is being drawn
         'SK_USE_FREETYPE_EMBOLDEN',
         # Android provides at least FreeType 2.4.0 at runtime.
         'SK_FONTHOST_FREETYPE_RUNTIME_VERSION=0x020400',
         # Skia should not use dlopen on Android.
         'SK_CAN_USE_DLOPEN=0',
@@ skipping 263 matching lines @@
         ],
         'cflags': [
           '-fuse-ld=gold',
         ],
         'conditions': [
           [ 'skia_android_framework', {
             'libraries!': [
               '-lstdc++',
               '-lm',
             ],
+            'cflags!': [
+              '-fuse-ld=gold',
+            ],
           }],
           [ 'skia_shared_lib', {
             'cflags': [
               '-fPIC',
             ],
             'defines': [
               'SKIA_DLL',
               'SKIA_IMPLEMENTATION=1',
             ],
           }],
@@ skipping 10 matching lines @@
       'defines': [
         'SK_USE_POSIX_THREADS',
       ],
     }],
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }